Last Updated： Aggregation Period:Jun 03, 2026～Jun 30, 2026
This ranking is based on the number of page views on our site.
Last Updated： Aggregation Period:Jun 03, 2026～Jun 30, 2026
This ranking is based on the number of page views on our site.
Last Updated： Aggregation Period:Jun 03, 2026～Jun 30, 2026
This ranking is based on the number of page views on our site.
1～30 item / All 312 items
Inclined solid-liquid separation device with brush-type cleaning machine.
● Resolves clogging without using cleaning water ● Space-saving and energy-efficient ● Brushes are easily replaceable during maintenance ● Achieves significant cost reduction compared to conventional high-pressure washer types
A pioneer in industrial water treatment systems. Supported by a wide range of users from industries facing water treatment challenges!
The "Scalwatcher IND Series" is a heavy-duty industrial water treatment device with an ABS casing. This series is of high quality and made in the Netherlands, with numerous sales achievements in Europe, America, the Middle East, and Japan. We place great importance on internal research results and feedback from the field, and we have continued development since 1991. 【Features】 ■ For heavy industry ■ ABS casing *For more details, please refer to the catalog. Feel free to contact us as well.
Improves water contamination and odor! A water treatment device suitable for preventing the adhesion of rust and dirt in pipes.
The "Scale Watcher" is a water treatment device capable of softening and detaching red rust and hard scale that occurs in piping, as well as suppressing their formation. It demonstrates significant improvement effects against the increased repair costs due to issues such as the occurrence of red rust in water supply pipes and red water in hot water pipes, including pipe replacements. It has also rehabilitated pipes that were on the verge of blockage in factories, enabling remarkable extensions of lifespan and securing water supply. Additionally, by reducing the use of detergents and chemicals, it alleviates the burden on wastewater treatment facilities and achieves substantial cost reductions. The "Scale Watcher" has been implemented in various settings, including factories, buildings, apartments, stores, and leisure facilities, and has been trusted for many years due to the wide range of confirmed improvement effects. 【Improvement Effects】 ■ Rehabilitation and extension of pipe lifespan ■ Significant reduction in the use of detergents and chemicals ■ Alleviation of management burden on wastewater treatment facilities ■ Prevention of equipment troubles by securing water supply
![[Case Study Collection] For removing red rust and extending the life of pipes! Water treatment equipment that does not use chemicals.](https://image.mono.ipros.com/public/product/image/48d/2000322388/IPROS69777819796704998787.jpeg?w=280&h=280)
A case study demonstrating significant cost savings achieved with a chemical-free water treatment device, Scale Watcher, has been released!
This case study collection presents examples of the scale watcher effect of water treatment devices using signal processing technology without the use of chemicals. Without using chemicals and without stopping the water line, it enables the removal of red rust from water supply and hot water systems and extends the lifespan of piping. In hospitals, schools, office buildings, condominiums, hotels, commercial facilities, pools, and recreational facilities, we introduce the improvement of red rust and attached scale in the water supply system, as well as the improvement of odors caused by oil adhesion in the drainage system, showcasing the wide-ranging benefits of our water supply and drainage lines. *For more details, please refer to the PDF materials or feel free to contact us.*
Achieving significant cost reductions! Introducing a case study on the effects of implementing industrial-grade water treatment systems.
We would like to introduce a case study on the introduction effects of the frequency modulation electromagnetic field water treatment device "Scale Watcher" handled by B-Tep Co., Ltd. In a system that had been injecting chemicals at a cost of 500,000 to 600,000 yen per month (approximately 7 million yen annually) since installation, we conducted a 6-month test of our product under the condition of no chemical injection. After 6 months, during the open inspection, we confirmed that there was no scale adhesion at all on the areas that were painted white. In the CT management after the introduction of "Scale Watcher," we achieved complete no chemical injection, except for chlorine treatment for slime prevention, in the sixth year. [Case Study] ■ Installed in a large cooling tower ■ Installation Locations - Pipe diameter 300mm × 1 unit - Pipe diameter 450mm × 1 unit ■ Introduction Effects - Significant reduction in expenses achieved *For more details, please refer to the PDF document or feel free to contact us.
![[Scale Watcher Introduction Case Study] Water Treatment Equipment - Wastewater Equipment Edition](https://image.mono.ipros.com/public/product/image/504/2000433599/IPROS16495977678226787618.JPG?w=280&h=280)
Significant reduction in the use of detergents and chemicals! Introducing case studies on the effects of implementing water treatment systems for light industry.
We would like to introduce the case study of the introduction effects of the frequency modulation electromagnetic field water treatment device "Scale Watcher," handled by B-Tep Co., Ltd. In wastewater facilities, the usage of detergents and chemicals (caustic soda) is high, leading to increased burden on wastewater treatment facilities and difficulties in their management. After the installation of this product, most dirt can now be washed away in the workplace with just water. The amount of detergents and chemicals used has been significantly reduced, and the burden on wastewater treatment facilities and management has drastically decreased. The fats that had been stuck can now be easily washed away with regular cleaning, greatly improving the environment of the workplace. [Case Study] ■ Installed in wastewater facilities ■ Issues - High usage of detergents and chemicals (caustic soda) increasing the burden on wastewater treatment facilities - Slippery floors in the workplace leading to accidents - Foul odors from grease buildup in ditches and drainage pits ■ Introduction Effects - Significant reduction in the use of detergents and chemicals - Drastic decrease in the burden and management of wastewater treatment facilities - Great improvement in the workplace environment *For more details, please refer to the PDF document or feel free to contact us.
![[Scale Watcher Introduction Case Study] Water Treatment Equipment - Casting Edition](https://image.mono.ipros.com/public/product/image/b67/2000437589/IPROS5822865959529440498.jpg?w=280&h=280)
Introducing case studies on the installation effects in the cooling line of a foundry furnace!
We would like to introduce the implementation effects of the frequency modulation electromagnetic field water treatment device "Scale Watcher," handled by B-Tep Co., Ltd. To verify the installation effects in the cooling line of a casting factory furnace, we installed this product on the supply side of the cooling water for the induction path (high frequency and low frequency) equipment. One year after operation, the interior of the cooling water piping showed that the softened deposits could be easily removed, and the inner surface had formed a black rust film, indicating that the reduction effect of this product was functioning well. [Case Study] ■ Installation effects in the cooling line of a cast iron factory furnace ■ Issues - Softened deposits do not easily detach ■ Implementation Effects - Deposits can be easily removed - Inner surface forms a black rust film *The downloadable PDF material is a digest version. If you would like the complete version, please contact us.
Installation without stopping the water supply and drainage line. The water treatment device "Scale Watcher" effectively softens and removes adhered scale and rust, preventing reattachment.
Business activities, starting with manufacturing, require high-quality and sufficient amounts of freshwater. At the same time, improving water usage efficiency and reducing total water intake, including groundwater, are critical issues alongside energy efficiency in the pursuit of a sustainable society. The scale watcher, which prevents clogging in water lines without the use of chemicals and improves heat exchange rates, can be selected from a wide range of models, from small diameters to 3000A piping, and continues to contribute to environmental ISO 14001 standards. 【Benefits of Implementation】 - Removal of adhered scale and prevention of attachment in cooling towers - Improvement of cooling efficiency and reduction of maintenance for large compressors, etc. - Removal of scale and prevention of attachment in scrubbers and humidifiers - Improvement of shower line clogging in incinerators and desulfurization towers - Reduction of chemical load in water supply and drainage lines *For more details, please refer to the catalog or feel free to contact us.
Eco Beam XL (For those troubled by red water in buildings)
Simply wrap it around the pipes to eliminate red water caused by corrosion in water supply pipes of buildings, apartments, and hotels! Eco Beam XL prevents red water caused by corrosion in water pipes through the application of powerful magnetic force, transforming red rust into black rust and extending the lifespan of the pipes. Its water treatment performance has been recognized by experts from large corporations and adopted by numerous companies. ■Features - Easy installation by simply wrapping it around the outside of the pipes, making it overwhelmingly cheaper compared to pipe replacement work. - No need for water outages or operational stoppages due to pipe cutting. - A unit type that can be installed regardless of the thickness or material of the pipes. - No maintenance, consumables, or power supply required, resulting in zero running costs. ■Effects - Stops red water from the tap. - Transforms red rust into black rust, prolonging the life of water supply pipes. We are currently seeking new distributors! Please feel free to contact us.
Simply wrap it around the pipes to eliminate scale and red water! Solve plumbing issues at a low cost.
EcoBeam XL is a magnetic water treatment device that utilizes powerful magnetic force to eliminate red water caused by corrosion of water pipes and to remove scale and slime within equipment piping. Factory equipment and building managers who are troubled by accumulated scale, red water, or rust should definitely take a look! ●【Low Cost!】 Simple installation by just wrapping it around the pipes. It is overwhelmingly low-cost compared to pipe renewal work. ●【Proven Track Record with Major Corporations!】 Its water treatment performance has been recognized by experts from large corporations with strict effectiveness evaluations. ●【Contributes to CO2 Emission Reduction!】 By enhancing the thermal efficiency of water systems, it reduces energy consumption and leads to CO2 reduction. 【Usage Examples】 ■ 'Scale Removal' from factory equipment piping ⇒ No maintenance, consumables, or power supply required, resulting in zero running costs. ■ 'Elimination of Red Water' due to corrosion of building's water supply piping ⇒ No worries about water outages or operational shutdowns due to pipe cutting. ■ 'Scale Removal' that effectively improves the performance of air conditioning units ⇒ Removes scale and prevents reattachment, providing stable chilled and hot water. ≪Currently offering a 3-month free loan and effectiveness verification! Please feel free to contact us≫
Just wrap it around the pipes! Eliminate red water and scale! Free catalog performance sheet available!
The Eco Beam XL is a device that utilizes powerful magnetic force to eliminate red water and remove scale from factory equipment piping. ●【Low Cost!】 Simple installation by just wrapping it around the piping. It is overwhelmingly lower in cost compared to piping renewal work. ●【Proven Track Record with Many Major Corporations!】 Its water treatment performance has been recognized by experts from large corporations with strict effectiveness evaluations. ●【Contributes to CO2 Emission Reduction!】 By eliminating scale in thermal exchange water systems, it reduces energy consumption and leads to CO2 reduction. ● A catalog and sales performance sheet will be provided without fail! 【Catalog Contents】 ・Introduction to Eco Beam XL ・Examples of use and effects in buildings, apartments, and hotels (Water supply piping, building air conditioning systems, boilers, etc.) ・Examples of use in factory equipment (Cooling towers, compressors, injection molding machines, etc.) *For more details, please request materials or press the catalog download button.
Ideal for dealing with red water, rust, scale, bacteria, and algae in water areas.
Since it uses an inline method that cuts and connects the piping, it can efficiently treat water with magnetic processing. In addition to addressing red water, rust, and scale, options for dealing with bacteria and algae are also available. The main issues related to water can be resolved with the magnetic water treatment device, Pure Dora.
No coagulants, sedimentation promoters, or filtration aids are needed at all.
■5 functions in 1 unit ■Space-saving ■Energy-saving ■Resource-saving ■Easy expansion even with increased discharge volume
No need for plumbing work or maintenance! Just install it to prevent algae, scale, and slime!
The "Aqua Clear" that we handle is a purification system that activates chlorine in water using an electromagnetic field, allowing for water treatment while adsorbing and destroying impurities. By simply installing it on the outside of the piping, it forms an electromagnetic field in the water flow, eliminating the need for new piping work and making installation very easy. Additionally, no maintenance work is required after installation! It can perform water treatment 24 hours a day. 【Product Features】 ■ Exhibits anti-corrosion effects ■ Can sterilize with minimal chlorine injection, reducing chlorine odor ■ Reduces the hassle of filter backwashing ■ Can be installed regardless of piping material ■ Achieves increased efficiency of equipment and longer lifespan ★ We are currently offering free demonstrations! Please apply through "Contact Us"! ★
Water treatment equipment
Model Voltage Pump Output Compressor Output Discharge Volume NAC-10 Single-phase 100V 0.2kw 0.08kw 20L/min NAC-110 Three-phase 200V 1.1kw 0.45kw 60L/min NAC-220 Three-phase 200V 2.2kw 0.75kw 150L/min NAC-550 Three-phase 200V 5.5kw 1.5kw 350L/min NAC-750 Three-phase 200V 7.5kw 1.5kw 620L/min NAC-1500 Three-phase 200V 11kw 2.2kw 1750L/min
![[Case Study] Employee cafeteria at a measuring instrument manufacturing factory + mineral oil wastewater treatment](https://image.mono.ipros.com/public/product/image/121/2000059123/IPROS1188636514753003537.jpg?w=280&h=280)
Delivery of an aqua blaster for the treatment of a mixture of mineral oil degreasing cleaning water and kitchen wastewater.
The treatment of mineral oil degreasing cleaning water from mechanical parts combined with kitchen wastewater was carried out using a unit tank equipped with an Aqua Blaster. Although the inflow volume is small, the wastewater has a high concentration of mineral-based normal hexane extractable substances, which initially raised concerns. However, since its installation, we have operated it without exceeding the treatment standards even once. For more details, please contact us or refer to the catalog.
![[Case Study] Circulating Water for Water-Based Paints in a Transport Equipment Manufacturing Factory](https://image.mono.ipros.com/public/product/image/17d/2000059147/IPROS8151649922915347798.jpg?w=280&h=280)
Solving various water treatment issues all at once! Recirculated water for water-based paints in transportation equipment manufacturing plants.
It offers excellent treatment capabilities and cost reduction, overturning the conventional concepts of wastewater treatment. 【Features】 - Solves various water treatment issues all at once! - Overturns the conventional concepts of wastewater treatment. - Achieves both excellent treatment capabilities and cost reduction. For more details, please contact us or refer to the catalog.
Reduction of costs for water supply, drainage fees, and other water treatment! Proposing solutions to challenges tailored to the environment.
<Common Issues in Water Treatment and Wastewater Treatment> I want to reduce my monthly water bill... I introduced a system, but it hasn't met my expectations... Wastewater treatment is costly... Maintenance requires time and money... ＼Ryuki Engineering has the solution／ Through thorough hearings, ongoing field tests, and product customization, we provide tailored "water treatment solutions" for each customer. 【Introducing Water Treatment Products】 ■ Membrane Filtration High-Precision Water Treatment Device ECO Clean: Achieves resource and cost reduction ■ Pleated Dryer Dakkann: Adds high value through powder drying and solution recovery! ■ Ozone Microbubble O-Mikuron III: Efficiently sterilizes, deodorizes, and decolorizes liquids ★ We are distributing "Case Study Materials" for plating factories, metal processing factories, etc. You can view them immediately from the 【PDF Download】.
![[Sample Processing Now Open] High-Precision Water Treatment Device 'ECO Clean'](https://image.mono.ipros.com/public/product/image/e56/2000528545/IPROS66474471522489776192.jpeg?w=280&h=280)
★Awarded the Invention Grand Prize & Excellent Environmental Device Award★ ECO Clean is a high-precision water treatment device using membrane filtration (MF area).
"Achieving 1/10 the cost in turbidity water treatment!" ★ECO Clean has won the "Main Award" at the 46th Invention Awards and the "Chairman's Award of the Japan Industrial Machinery Manufacturers Association" at the 46th Excellent Environmental Equipment Awards★ What is 'ECO Clean'? ■ Purifies industrial water and river water turbidity to tap water levels A device that can be recycled and reused as water for production lines ■ Comparison with conventional MF (hollow fiber and flat membrane) Flux per unit area / 10 times, allowable SS (suspended solids concentration) / 10 times ■ Comparison with coagulation sedimentation and sand filtration devices Chemical usage / 90% reduction, installation space / approximately 90% reduction ■ Equipped with a unique automatic clogging regeneration device for fully automatic operation ■ Filter lifespan of 2 to 4 years, filter replacement in 10 minutes, easy maintenance ■ 10 patents obtained, 2 pending (as of July 2020) 【Do you have any of these concerns?】 ■ Want to increase purity to below 1 turbidity, which is difficult with existing water treatment equipment ■ Want to increase treated water volume, but installation space is limited ■ Disposable filters clog quickly, leading to high replacement costs and effort ■ Considering equipment installation, but membrane filtration equipment is expensive If you have such challenges, please feel free to consult with us!
Limited OPEN until the end of December 2022! Exhibiting water treatment equipment, including filtration systems! New products and new technologies will also be unveiled!
At Ryuki Engineering, we propose water treatment solutions tailored to your intended use. We are pleased to announce that our virtual exhibition is now OPEN on our company website!! It faithfully recreates the booth from our real exhibition, allowing you to enjoy the atmosphere of the exhibition. You can watch product videos and download catalogs or make inquiries through the link page. The exhibition will be available until the end of December 2022, so please visit our booth online! ^^ ↓ Access the virtual exhibition via the link below! ↓ *Please turn off your browser's automatic translation feature to prevent garbled text.
Adsorption and removal of PFAS, BOD, COD, TOC, color, odor, harmful substances, VOCs, etc. Fusion of filters and functional powders! Unique water treatment technology.
Recently, organic fluorine compounds (PFAS), which have been pointed out as harmful to the human body, have been gaining attention. In January 2023, the Ministry of the Environment held its first expert meeting on this issue. ECO Clean LFP is a unique water treatment technology that attaches functional powder to pleated filters, adsorbing and removing dissolved substances such as PFAS (PFOS/PFOA/PFHxS, etc.), BOD, COD, TOC, color, odor, harmful substances, and VOCs.
Reduction of water supply fees, drainage costs, and other water treatment costs! Proposing solutions to challenges tailored to the environment.
<Common Issues in Water Treatment and Wastewater Treatment> I want to reduce my monthly water bill... I introduced a system, but it hasn't delivered the expected results... Wastewater treatment is costly... Maintenance requires time and money... ＼Ryuki Engineering Provides Solutions／ Through thorough hearings, ongoing field tests, and product customization, we offer tailored 'water treatment solutions' for each customer. 【Introducing Water Treatment Products】 ■ Membrane Filtration High-Precision Water Treatment Device ECO Clean: Achieves resource and cost reduction ■ Pleated Dryer Dakkan: Adds high value through powder drying and solution recovery! ■ Ozone Microbubble O-Mikuron III: Efficiently sterilizes, deodorizes, and decolorizes liquids ★ We are distributing "Case Study Materials for Problem Solving" for plating factories, metal processing factories, etc. You can view them immediately from [PDF Download].
After repeated trial and error, we have successfully completed an effective magnetic water treatment device.
The "Muzatsu" magnetic water treatment device from Toko has been introduced to many customers as a solution for scale, slime, red water, and algae issues, and they have experienced its effectiveness. In developing "Muzatsu," we found that while there are opinions within the industry claiming that magnetic water treatment devices are "ineffective," there are numerous academic and governmental papers asserting their "effectiveness." Therefore, our company scrutinized products that were said to be ineffective and identified three common points: 1. They have a low magnetic force of 5000G or less, with the mainstream being below 3000G. 2. There is no effective magnetic field in the waterway. 3. They ignore the absolute flow rate required by Lemming's law. To complete a product that meets all three of these criteria, our company engaged in repeated trial and error and struggles from the design stage, ultimately spending a year and a half to complete "Muzatsu." For more details, please contact us or download the catalog.
Economic measures for cooling towers and solutions for red water, water scale, and algae! A magnetic water treatment device with a safe design that prevents magnetic leakage.
We would like to introduce 'Muzai', handled by Toko Co., Ltd. This product is based on the electromagnetic induction phenomenon discovered by Faraday. The electromagnetic induction phenomenon refers to the occurrence of electricity when a conductor (water) is moved within a magnetic field, generating electromotive energy. The dissolving power and penetration ability of water are enhanced, providing a permanent solution to problems such as scale (water stains), slime (bacteria), rust, and algae from the root. 【Features】 ■ Economic measures for cooling towers ■ Measures against red water, water stains, and algae ■ Measures to prevent clogging of water pipes ■ Safe design with no magnetic leakage ■ Pressure loss is 5-7% of the operating pressure, with no impact *For more details, please refer to the PDF document or feel free to contact us.
Revolutionary effects recognized by major corporations! A magnetic water treatment device that reduces maintenance costs without the need for chemicals and improves cooling efficiency.
The "MMF Series" is a product that can be used in systems such as factory facilities. It has revolutionary effects recognized by large corporations. It is suitable for cooling towers with a circulating water specification. It requires no power, has a lifespan of nearly permanent duration, and maintenance costs are very low. The PDF document below also includes "system examples for cooling towers," so please download and take a look. 【Features】 ■ No power required ■ Lifespan nearly permanent ■ Very low maintenance costs ■ 0% failure rate ■ 100% efficiency *For more details, please refer to the PDF document or feel free to contact us.
The facility's water pipes are revived! A magnetic water treatment device that enables measures against red water, prevents clogging of water pipes, and prolongs the lifespan of water supply pipes.
The "MME Series" is a product that can be used for water pipe measures in general facilities. The facility's water pipes are revitalized. It is designed for water pipes with a one-pass water specification. It has a 0% failure rate, a lifespan that is semi-permanent, and operates at 100% efficiency without the need for power. The PDF document below also includes "system examples for apartments, hospitals, and hotels," so please download it and take a look. 【Features】 ■ No power required ■ Semi-permanent lifespan ■ Low maintenance costs ■ 0% failure rate ■ 100% efficiency *For more details, please refer to the PDF document or feel free to contact us.
Introduction of case studies on scale prevention using hydroflow electromagnetic water treatment devices (for oil well pipes).
We will introduce a case of scale countermeasures using the "Hydroflow Electromagnetic Water Treatment Device" for oil well pipes. Calcium scale primarily occurs in the extraction pipes of oil wells, leading to blockages that render them unusable. Therefore, we installed one Hydroflow model: C120EX (4”) on the oil well's production pipe to address scale issues in the piping down to 5000 meters underground. 【Countermeasures and Effects】 - Hydroflow was installed on the land-based pipe to address the old scale attached to the pipe. ⇒ The internal scale softened and was lifted along with the oil, resulting in a cleaner pipe. - It was proven that scale countermeasures could be taken on both sides of the installed pipe. - Due to the positive effects, a second unit was similarly installed in another oil well. For more details, please refer to the catalog or feel free to contact us.
Introduction of a case study on algae control in large park ponds through the installation of Hydroflow.
Here is a case study of the "Hydroflow Electromagnetic Water Treatment Device" for algae control in a large park pond. The water in the pond of a large park in Hong Kong was murky with algae year-round. From the bridge, it was almost impossible to see the koi swimming. The city authorities were struggling to find a solution. [Installation and Effect Confirmation] ■ The Hydroflow was installed before the filtration system of the main circulation water line in this pond. ⇒ After three months, algae no longer appeared, and the water became clear. ⇒ The koi swimming became beautifully visible, much to the delight of visitors. For more details, please refer to the catalog or feel free to contact us.
The running costs are surprisingly low! Effectively controlling bacteria and virus issues.
This is an introduction to other sterilization technologies and the installation case of Agriflow for UV treatment in fish farms. The UV system is very expensive, requiring regular maintenance and replacement of spare parts, along with monthly running costs for electricity. Therefore, the owner of this fish farm was looking for a better device or technology than the UV system, and as a result, decided to adopt Agriflow from HydroPath. The outcome was that they could effectively control the problems of bacteria and viruses, and the running costs were surprisingly low (25–65w/h). 【Case Overview】 ■Challenges - The UV system is expensive, requiring regular maintenance and replacement of spare parts. - There are monthly running costs for electricity. ■Results - Successfully controlled the problems of bacteria and viruses. - Low running costs. *For more details, please refer to the PDF document or feel free to contact us.
![Measures Against Red Water from Tap Water [Electromagnetic Water Treatment Device Vol. 2]](https://image.mono.ipros.com/public/product/image/10c/2000579434/IPROS33588522744724361123.jpeg?w=280&h=280)
Introducing a case study of the installation of the electromagnetic water treatment device Hydroflow in a condominium that has reached its 26th year after completion!
We would like to introduce a technical case of installing the electromagnetic water treatment device "Hydroflow" in a certain condominium in Miyamae Ward, Kawasaki City. This condominium has reached its 26th year since completion, and during the removal of the water supply pipe three years ago, rust was confirmed due to imperfect insulation at the joints of the lining pipe. The management company proposed a budget of ¥6,000,000 for the water supply pipe rehabilitation work using a resin lining method (including inside each unit), with a construction period of 2 to 3 days. After three years of investigation, the management association decided to install this new product from the UK, which requires no construction or maintenance, and placed an order. 【Case Overview】 ■ Test Period: April 26, 2013 (26 years after completion) ■ Location: Certain condominium in Miyamae Ward, Kawasaki City (18 units) ■ Target Device - An electromagnetic water treatment device "Hydroflow" made in the UK, model P60 (for 40A to 50A), was installed on the outer diameter of the main water supply pipe 40A. - Power consumption: 20W *For more details, please refer to the PDF document or feel free to contact us.
