We have compiled a list of manufacturers, distributors, product information, reference prices, and rankings for Precision Springs.
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Precision Springs Product List and Ranking from 9 Manufacturers, Suppliers and Companies | IPROS GMS

Last Updated： Aggregation Period:Feb 04, 2026～Mar 03, 2026
This ranking is based on the number of page views on our site.

Precision Springs Manufacturer, Suppliers and Company Rankings

Last Updated： Aggregation Period:Feb 04, 2026～Mar 03, 2026
This ranking is based on the number of page views on our site.

  1. アキュレイト 東京カスタマーセンター Tokyo//Ferrous/Non-ferrous metals
  2. 飯田スプリング Tokyo//Manufacturing and processing contract
  3. 宮下スプリング製作所 Tokyo//Manufacturing and processing contract
  4. 4 佐野鉄工スプリング製作所 Niigata//Resin/Plastic
  5. 4 小松ばね工業 Tokyo//Manufacturing and processing contract
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Precision Springs Product ranking

Last Updated： Aggregation Period:Feb 04, 2026～Mar 03, 2026
This ranking is based on the number of page views on our site.

  1. Bane's AKIBA Showroom アキュレイト 東京カスタマーセンター
  2. The difference between coloring steel wire through low-temperature annealing and bluing, and their purposes. アキュレイト 東京カスタマーセンター
  3. Principles, Effects, and Practical Methods of Shot Peening and Setting アキュレイト 東京カスタマーセンター
  4. Observation of fracture surfaces and understanding of the safety zone in fatigue testing of metallic materials. アキュレイト 東京カスタマーセンター
  5. 4 Causes of defects due to heat treatment and preventive measures: countermeasures for overheating, quenching, and cracking. アキュレイト 東京カスタマーセンター

Precision Springs Product List

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Bane's AKIBA Showroom

Bane's AKIBA Showroom

We welcome consultations from those using springs for the first time, as well as those who are currently facing difficulties! Please feel free to stop by.

"See! Touch! Choose!" In the spring showroom, you can look at and touch various samples and demo units, such as Ultra Springs (original standard springs) and Accurate Tangless Inserts, while consulting with spring professionals to make your selection. By viewing nearby application examples, you may find ideas and hints for your own projects.

  • nut
  • Precision Springs

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[Data] Accurate Tangless Insert

[Data] Accurate Tangless Insert

Introducing a method to dramatically improve the efficiency of wire insert insertion work!

This document introduces the revolutionary product "Accurate Tungsten Insert," which is a metal insert. It provides detailed information about its mechanism, strengths, and comparisons with other inserts. Additionally, specific products such as metric-free and metric locking tools are also included, so please take a moment to read through it. [Contents (excerpt)] ■Characteristics ■Part number description ■Metric-free ■Metric locking ■Metric bronze ■Metric taping packaging *For more details, please download the PDF or feel free to contact us.

  • Other metal materials
  • Precision Springs

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Methods for comparing the hardness of minerals and metals, and testing methods using diamonds.

Methods for comparing the hardness of minerals and metals, and testing methods using diamonds.

[Reproduction of Private Spring Preparatory School Lecture 1] Comparing Hardness: It's About Scratching! An explanation of metal hardness and a testing machine using diamonds.

From now on, I will borrow this space for a while to establish the Spring Preparatory School. Difficult subjects will be learned after entering a regular university, so here is a preparatory school where you can study casually. Typically, preparatory schools tend to have a gray mood, but in that regard, our school, aptly named Spring, offers a warm and pleasant atmosphere. Feel free to enjoy a few minutes of lessons in any style you like. That said, since we are receiving payment for the newspaper, let's start with a solid and serious discussion. *You can view the detailed content of the article in the PDF. For more information, please feel free to contact us.*

  • Spring
  • Precision Springs

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The difference between coloring steel wire through low-temperature annealing and bluing, and their purposes.

The difference between coloring steel wire through low-temperature annealing and bluing, and their purposes.

[Reproduction of Private Spring Preparatory School Lecture 41] Low-temperature annealing is commonly referred to as bluing! The blue color is the color of the iron oxide film formed on the surface of the steel.

When you anneal shiny steel wires like piano wire or hard steel wire in the air, they develop a bluish color. Since blue is the color of the bluebird, this is likely why low-temperature annealing is referred to as bluing. This blue color is the result of a layer of iron oxide that forms on the surface of the steel. Although this oxide layer is very thin, it is strong, dense, and has considerable corrosion resistance. However, the colors produced by bluing are not limited to just blue. *For more detailed information, please refer to the PDF. Feel free to contact us for further inquiries.*

  • Spring
  • Precision Springs

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Miyashita Spring Manufacturing Co., Ltd. Product Introduction Spring

Miyashita Spring Manufacturing Co., Ltd. Product Introduction Spring

Advanced products come from advanced technology. We respond to demand in every era.

Miyashita Spring Manufacturing Co., Ltd. designs materials suitable for springs, such as piano wire, stainless steel wire, and phosphor bronze wire, and processes them according to user requirements. Furthermore, our developed ultra-fine compression springs have made it possible to achieve the ultra-miniaturization of advanced IC circuit boards. We constantly pursue the precision and durability that users demand at the microscopic level. In ultra-precision springs, we have successfully achieved winding processes with extremely fine wire diameters of 0.016 mm and outer diameters of 0.066 mm through our unique machine development and manufacturing processes. For more details, please contact us or refer to our catalog.

  • Spring
  • Precision Springs

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Miyashita Spring Manufacturing Co., Ltd. Business Introduction

Miyashita Spring Manufacturing Co., Ltd. Business Introduction

We will always pursue the accuracy and robustness that users demand at a microscopic level.

Miyashita Spring Manufacturing Co., Ltd. designs materials suitable for springs, such as piano wire, stainless steel wire, and phosphor bronze wire, and processes them according to user requests. Furthermore, our developed ultra-fine compression springs have made it possible to achieve the ultra-miniaturization of advanced IC circuit boards. We constantly pursue the accuracy and durability required by users at the micro level. In the field of ultra-precision springs, we have successfully achieved winding processing of extremely fine wire with a diameter of 0.016 mm and an outer diameter of 0.066 mm through our unique machine development and manufacturing processes. In the corporate member award system, we were recognized for developing the world's smallest spring, contributing to the miniaturization of electronic devices, and received an award from the Nihon Keizai Shimbun in March 1990. For more details, please contact us or refer to our catalog.

  • Spring
  • probe
  • Precision Springs

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Business Introduction

Business Introduction

"Integrity" and "speed." A commitment to 100% quality, not 99%.

Since its establishment in 1962, our company has been recognized for its technological capabilities, development strength, and quality in the automotive field, supplying springs for fuel supply, exhaust gas control, boost pressure control, distribution devices, and various safety devices. In the field of currency processing machines (ATMs), we provide springs for various functions to ensure reliable processing of banknotes and coins. We manufacture over 5,000 types of precision springs tailored to specific applications. Our "precision sheet metal" is incorporated into machines that require safety, security, and convenience in daily life. It plays a vital role in components such as the housing, frame, and main parts of banknote processing machines, as well as key parts of precision scales and covers for machine tools, often in areas not visible in everyday use. Additionally, we create products tailored to customer needs, whether they are completely original or focused on quality and convenience. Our proud technology has made it possible to meet the varying customer demands for "quality," "cost," and "delivery time" based on different applications and purposes. For more details, please contact us or refer to our catalog.

  • Spring
  • Other Auto Parts
  • Other machine elements
  • Precision Springs

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Stock sales site for springs, fasteners, and special screws.

Stock sales site for springs, fasteners, and special screws.

You can purchase products listed in the comprehensive catalog online.

This is an introduction to the stock sales site "Accurate Net Store" for springs, fasteners, and special screws.

  • others
  • Precision Springs

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Changes in the fatigue strength of springs due to dimensional effects and the influence of internal defects in the material.

Changes in the fatigue strength of springs due to dimensional effects and the influence of internal defects in the material.

[Reproduction of Private Spring Preparatory School Lecture 21] Yielding and fatigue destruction are related not only to the maximum surface stress but also to the stress at a certain depth from the surface!

Now, let's talk about the effect of dimensions. There are various types of leaf springs, both thick and thin, and coil springs with materials of different diameters, both thick and thin. In this way, when it comes to plates, the thickness changes, and for round bars, the diameter changes. Does the fatigue strength remain the same? In fact, it does change. This is referred to as the dimensional effect in fatigue. When testing thick and thin specimens in fatigue tests, excluding tensile and compressive fatigue limits, generally, thinner specimens show a greater fatigue limit in bending and torsion. Since most springs are used in bending or torsion, let's keep this relationship in mind as well. *For detailed content of the article, please refer to the PDF. For more information, feel free to contact us.*

  • Spring
  • Precision Springs

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Causes of quenching distortion and methods for suppression, effective measures using press quenching methods.

Causes of quenching distortion and methods for suppression, effective measures using press quenching methods.

[Reproduction of Private Spring Preparatory School Lecture 61] Explanation of quenching distortion! A method of quenching with less distortion is also explained.

Let's study how quenching distortion occurs. Even without special study, you can clearly understand the results just by conducting an experiment. A flat spring plate of appropriate length is ideal for the experiment. Heat this spring plate to the quenching temperature and cool it from only one side of the plate. For example, if you cool only the bottom side, it will ultimately deform so that the bottom side becomes convex. Let's look at the diagram. First, since the bottom side of the plate is sprayed with water, it will naturally shrink due to thermal contraction. In other words, since the bottom side shrinks, the plate will deform to be convex upwards. *For detailed content of the article, please refer to the PDF. For more information, feel free to contact us.

  • Spring
  • Precision Springs

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[Comic Materials] Custom Spring Edition

[Comic Materials] Custom Spring Edition

For those who want spring design and estimation without incurring costs! Introducing custom springs.

This booklet introduces the custom spring automatic estimation network "Erabanekun." It explains that by simply selecting the recommended dimensions that can be processed, you can complete everything from design to estimation and drawings in as little as 5 minutes. The content is designed to be easy to reference when considering implementation, so please take a moment to read it and make use of it. 【Features of Erabanekun】 ■ Just select the recommended dimensions that can be processed ■ Estimation in as little as 5 minutes ■ No registration required to check *For more details, please download the PDF or feel free to contact us.

  • Spring
  • Precision Springs

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[Manga Materials] Ultra Spring <Maintenance Edition>

[Manga Materials] Ultra Spring <Maintenance Edition>

To continue using the same spring for a long time! We will definitely not discontinue it in the future.

This brochure introduces the "Ultra Spring," which is suitable for solving concerns such as wanting to continue using springs with the same part number. We explain that we still have the springs for machines purchased 30 years ago, ensuring peace of mind for maintenance and production transfers. Additionally, we highlight features such as our commitment to having no discontinued products. Please feel free to download and take a look. 【Features】 ■ Commitment to having no discontinued products ■ Unique standardization of spring sizes and strengths *For more details, please download the PDF or feel free to contact us.

  • Spring
  • Precision Springs

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[Manga Materials] Ultra Spring <Selection Edition>

[Manga Materials] Ultra Spring <Selection Edition>

A method to easily find the perfect spring for you! Introducing the selection method.

In this booklet, we introduce the selection method "Ultra Spring," which is perfect for situations where you won't know until you buy and try it. We explain that you can choose springs that fit your products in various ways, such as wanting to "actually hold and choose" or "select based on dimensions and load." We also highlight features that make it easy to choose springs. Please download and take a look. 【Features】 ■ Can be selected in various ways ■ Physical samples are available ■ A variety of selection tools tailored to your needs *For more details, please download the PDF or feel free to contact us.

  • Spring
  • Precision Springs

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[Manga Materials] Ultra Spring <Two-Point Load Edition>

[Manga Materials] Ultra Spring <Two-Point Load Edition>

For those who want stable quality springs! Consistent quality can be maintained with two-point load management.

This booklet introduces the "Ultra Spring," a spring that consistently maintains stable quality. It clearly explains the adoption of two-point load management, which keeps the strength of the spring constant by managing the two points of the range in which the spring expands and contracts. Additionally, it includes descriptions of the product features such as high quality and high precision, as well as explanations about two-point load management. Please feel free to download and take a look. 【Features】 ■ High quality and high precision ■ Adoption of two-point load management ■ Support for small orders is also possible ■ Order today, delivered by tomorrow *For more details, please download the PDF or feel free to contact us.

  • Spring
  • Precision Springs

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[Manga Material] Too Cool Techniques Wandering Chronicle: Accurate Edition

[Manga Material] Too Cool Techniques Wandering Chronicle: Accurate Edition

Introducing tangless inserts, helicoils, and actual catalogs!

In this booklet, we introduce our company as a chronicle of ultra-cool technology. We mention that our products have no discontinued items and that the "Tangless Insert" is our main revenue generator, providing a clear explanation of Helicoil. We also introduce our original standard spring, the "Ultra Spring," and a physical catalog. 【Our Features】 ■ No discontinued products ■ Main revenue generator is the "Tangless Insert" ■ Physical catalog available ■ "Select Spring-kun" allows for online selection ■ Ultra Spring manages two-point load *For more details, please download the PDF or feel free to contact us.

  • Spring
  • Precision Springs

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Full-size catalog of springs

Full-size catalog of springs

A catalog arranged in order of spring size with full-scale illustrations! It starts with the smallest size.

This catalog introduces our "Ultra Spring," a standard spring that we handle. The size, which is difficult to grasp with just numerical data, is immediately clear, and it is possible to compare it with the actual spring on hand using a full-size illustration. This catalog makes it easy to select springs that are similar in shape. It includes compression coil springs and tension coil springs, showcasing various outer diameters. Please feel free to download and take a look. [Contents] ■ Limited Edition Supplement: Spring Comic "Selection Edition" ■ Compression Coil Springs ■ Tension Coil Springs ■ Inquiries *For more details, please download the PDF or feel free to contact us.

  • Spring
  • Precision Springs

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Choose not you, three functions.

Choose not you, three functions.

Three functions: selection, calculation, and design! This is the one for compression and tension springs.

We would like to introduce the three functions of "Erabane-kun" that we handle. By entering your desired conditions for each item, you can pick up the appropriate standard products. It features a "Search Mode" that allows you to filter standard products that meet your search criteria in one go, as well as a "Calculation Mode" that can calculate the necessary loads for design and even the lifespan. Additionally, there is an "Automatic Quotation Mode" that can automatically handle everything from design to quotation in as little as 5 minutes, allowing for easy ordering in four steps. 【Features】 ■ Search Mode - Pick up appropriate standard products by entering your desired conditions for each item. - Narrow down standard products that match your search criteria in one go. ■ Calculation Mode - Calculate the necessary loads for design and even the lifespan. - Create a quotation request document directly from the calculated content. *For more details, please download the PDF or feel free to contact us.

  • Spring
  • Precision Springs

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Sano Ironworks Co., Ltd. Spring Manufacturing Company - Company Profile

Sano Ironworks Co., Ltd. Spring Manufacturing Company - Company Profile

A wealth of experience in handling various springs! We accommodate different shapes, materials, and sizes.

Sano Ironworks Co., Ltd. manufactures and sells precision springs, hot springs, thick and thin plate springs, and more. Beautifully functional machines combine the memory and skill of human hands to create precise springs. We have inherited this skill and have faced numerous challenges, progressing step by step. We will continue our tireless efforts every day to embrace new challenges in the future. 【Business Activities】 ■ Precision springs, hot springs, thick and thin plate springs, stop rings, spring pins, drilling casing centralizers, screw conveyors, and other manufacturing and sales. *For more details, please refer to the PDF document or feel free to contact us.

  • Contract manufacturing
  • Precision Springs

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Komatsu Bane Industry Co., Ltd. is currently offering a comprehensive catalog!

Komatsu Bane Industry Co., Ltd. is currently offering a comprehensive catalog!

1,000 needs with 1,000 technologies.

Ultra-precision springs required in various fields of the precision machinery industry. We respond to each of these diverse needs with a flexible development approach, a track record built on years of experience, and assured quality. All products are made to order! Komatsu Spring Industry manufactures "springs" used in various fields. Since our founding in 1941 in Ota Ward, we have been producing precision springs used in cameras, watches, electronic devices, communication equipment, and automotive parts. We work closely with our customers to create reliable products, considering size, shape, and strength. We manufacture springs with wire diameters ranging from microns to around 2mm. For more details, please contact us.

  • Spring
  • Other machine elements
  • Precision Springs

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Characteristics of Kanto Spring: Non-magnetic

Characteristics of Kanto Spring: Non-magnetic

"Magnetic and unusable!" We will provide the best solution for your spring troubles!

At Kizuki Spring, we provide optimal proposals tailored to the required strength, including non-magnetic, non-ferrous, and high-strength materials. If you are looking for springs that are non-magnetic, please feel free to consult with us. 【Features of NAS106N】 ■ Non-magnetic properties approaching phosphor bronze μ < 1.003 ■ Superior to 316H, ideal for resistance to pitting corrosion ■ Heat resistance equal to or better than 631J1 ■ Fatigue characteristics superior to 304 *For more details, please refer to the PDF document or feel free to contact us.

  • Processing Contract
  • Spring
  • Other machine elements
  • Precision Springs

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Busei Precision Spring Co., Ltd. Business Introduction

Busei Precision Spring Co., Ltd. Business Introduction

A specialist in metal wire shape processing with approximately 700,000 products produced annually.

Busei Precision Spring Co., Ltd. manufactures and sells all types of springs. We handle materials from spring steel to special materials (such as Inconel, titanium, Hastelloy), with wire diameters ranging from 0.1mm to 90mm, and from simple coil springs to complex metal bending processes (including various shapes, wire crafting, and wire forming). With over 150 business partners and the ability to produce a wide variety of small lots, we offer more than 4,000 types of products annually, so please feel free to contact us with your requests. 【Features】 ■ A large number of high-performance machines (such as UF/RX/MX) ■ Skilled craftsmanship with over 60 years of experience ■ Thorough automation of processes like heat treatment and in-house polishing ■ Strict reduction of indirect costs ■ One craftsman is responsible for the entire process until completion, also striving for efficiency in administrative tasks *For more details, please download the PDF or feel free to contact us.

  • Interior parts
  • Precision Springs

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Precision spring

Precision spring

Leave precision springs to us.

Our company manufactures precision springs for automotive equipment, electrical equipment, office equipment, and more. By establishing a product inspection and shipping management system, we have achieved improved service for our customers. Additionally, we also manufacture forming processes, spirals, and ladder chains (for transmission), so please feel free to consult us if you have any requests. 【Manufactured Products】 ■ Precision springs for automotive equipment, electrical equipment, office equipment, forming processes, spirals, and ladder chains (for transmission) *For more details, please download the PDF or feel free to contact us.

  • Spring
  • Other machine elements
  • Precision Springs

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Precision spring

Precision spring

Leave the prototype handling to us! For the manufacturing of small-sized springs, come to our company.

Our company manufactures various precision springs, including custom-made springs such as compression springs, tension springs, torsion springs, and wire processed products. We specialize in the production of relatively small springs with thin wire diameters, with mass production accounting for 20%. Currently, most of our production is small lot production starting from just one piece. We also manufacture special springs that other companies have declined to produce, using our skilled techniques. 【Features】 ■ Design support available ■ High quality despite ultra-short delivery times ■ Delivering ideal components *For more details, please download the PDF or contact us.

  • Spring
  • Precision Springs

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Learn about methods for measuring hardness and the types, roles, and importance of testing machines.

Learn about methods for measuring hardness and the types, roles, and importance of testing machines.

[Reproduction Private Spring Preparatory School Lecture 2] The national standards for power test machines, testing methods, and reference pieces are firmly established in JIS!

The method of measuring hardness can now be done using testing machines as mentioned above, but what does the term "hardness" generally express? It often represents not only the degree of resistance to diamond but also characteristics such as being difficult to deform, hard to cut, prone to wear, and so on, which are commonly referred to as the mechanical properties of materials represented by the term hardness. Therefore, there is also a term "spring hardness," and nowadays, it conjures the image of a very strong and elastic spring. *For detailed content of the article, you can view it in the PDF. Please feel free to contact us for more information.*

  • Spring
  • Precision Springs

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The evolution from horse-drawn carriages to automobiles and the development and modernization history of Japanese spring manufacturing.

The evolution from horse-drawn carriages to automobiles and the development and modernization history of Japanese spring manufacturing.

[Reproduction of Private Spring Preparatory School Lecture 5] The rickshaw is also a benefactor for the spring industry! It also discusses the modernization of the spring industry.

The birth of Japan's spring industry, as mentioned last time, began with carriage springs. Even today, about a hundred years after the Meiji era, spring manufacturers are making a living from automobiles, which are a transformation of carriages, so we must be grateful to carriages. So, when did carriages, which have been so beneficial to Japan's spring industry, arrive in Japan? According to records, they began operating as public carriages in the Keihin area in 1869 (the second year of the Meiji era), and by the seventh year of Meiji, they were also operating in Tokyo. The number of these public carriages was only 319 in the eighth year of Meiji, but by around the time of the Russo-Japanese War, 38 years later, it had increased to 6,631, which is quite significant. *For more detailed information, please refer to the PDF. For further inquiries, feel free to contact us.*

  • Spring
  • Precision Springs

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The advancement of automobile development and spring technology, as well as innovations in materials and research progress in the late Taisho period.

The advancement of automobile development and spring technology, as well as innovations in materials and research progress in the late Taisho period.

[Reproduction of Private Spring Preparatory School Lecture 7] The Emergence of Automobile Springs, the Great Earthquake, and the Major Advancement of Automobiles! The late Taisho period was an era when spring research became full-fledged.

In the previous discussion, we talked about the beginning of domestic production of spring materials in the early Taisho period, and how various manufacturing facilities and testing equipment were established, leading to a significant leap forward. This time, let's continue with the late Taisho period. By the early Taisho period, the main railway lines were mostly constructed, and streetcars were operating in large cities; however, it was still the era of horse-drawn carriages and rickshaws. During this time, bicycles and automobiles were rapidly gaining popularity. However, while bicycles were becoming common, automobiles were still vehicles for the privileged class, and it was not yet the case that everyone could have one, as is the case today. Nevertheless, as vehicles changed, it was inevitable that springs would also change, and spring manufacturers had no choice but to start producing automobile springs. *For more detailed information, please refer to the PDF. Feel free to contact us for further inquiries.*

  • Spring
  • Precision Springs

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Difference between premium liquor and hard steel: Changes in properties brought about by alcohol content and carbon amount.

Difference between premium liquor and hard steel: Changes in properties brought about by alcohol content and carbon amount.

[Reproduction Private Spring Preparatory School Lecture 26] As the amount of carbon increases, both tensile strength and yield point increase!

In the last class, we learned that the properties of steel can change dramatically with just a tiny difference in carbon content, comparable to a speck of dust. For example, even when comparing mild steel and hard steel, the difference in carbon content is only about 0.5%. Just like how premium liquor with a higher alcohol content is more expensive, steel also becomes more costly with a higher carbon content. However, the difference between mild steel and hard steel is not just a matter of the distinction between second-class and premium liquor. *For more detailed information, please refer to the PDF. Feel free to contact us for further inquiries.*

  • Spring
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The relationship between yield point, tensile strength, strength, and hardness in steel tensile testing.

The relationship between yield point, tensile strength, strength, and hardness in steel tensile testing.

[Reprint Private Spring Preparatory School Lecture 27] Explanation of the load and elongation diagram in the tensile test of steel!

Today, let's study a little about the terms that express the strength and brittleness of steel. The strength of steel is usually understood through a tensile test. As you may know, in a tensile test, a tensile load is applied along the axis of the specimen until it fractures, and during this process, the relationship between the load and elongation, as well as the reduction in cross-sectional area, reveals the elastic limit, yield point, tensile strength, elongation, and reduction of area. *For detailed content of the article, you can view it in the PDF. Please feel free to contact us for more information.

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The purpose and effects of low-temperature annealing of wire springs, and the importance of the manufacturing process.

The purpose and effects of low-temperature annealing of wire springs, and the importance of the manufacturing process.

[Reproduction of Private Spring Preparatory School Lecture 40] Explanation of the changes in mechanical properties due to low-temperature annealing of piano wire and oil-tempered wire!

Today, let's study why this annealing and spring wire undergo low-temperature annealing and what effects it has when low-temperature annealed. Now, let's learn what low-temperature annealing is. In heat treatment terminology, there is no term for low-temperature annealing. It is referred to as low-temperature normalization. This is because there is no character for "anneal" in the commonly used kanji. Low-temperature normalization is a method of annealing that involves heating below the transformation temperature to adjust internal stresses. *For detailed content of the article, you can view it in the PDF. For more information, please feel free to contact us.*

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Principles, Effects, and Practical Methods of Shot Peening and Setting

Principles, Effects, and Practical Methods of Shot Peening and Setting

[Reproduction of Private Spring Preparatory School Lecture 44] Shot peening is a surface treatment! Explanation of the final process setting as well.

Shot peening is a surface treatment. It is very effective for springs made from heat-treated steel wire and springs that are formed from annealed wire and then heat-treated, but it is not as effective for springs made from cold-worked steel wire. This is because the surface of cold-worked steel wire is originally quite smooth. It is said that "a fair complexion hides seven troubles," and indeed, having a fair complexion is the first condition of beauty. Such beauties only need to wash their faces, and there is no need to apply expensive cosmetics. *For detailed content of the article, please refer to the PDF. For more information, feel free to contact us.

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