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Plug heater
A plug heater is a screw-in type heater used by immersing it in a liquid. Generally, inch-sized screws are commonly used, and the number of sheath heaters is selected based on the size of the screw. Since the screw part, which is a component of the plug heater, can be used directly as a plug, no special tools or bolts are required. The replacement of the heater is smooth, making it a very convenient structure.