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1. To remove the modified cylinder part from the original heater ring. 2. Measure the size of the cylinder, usually including the length of the circumference, calculate the need for insulating wadding, and after the initial estimation of the heating coil power, the position of the winding  is

The main raw material of HDPE pipe is high-sensitivity polyethylene!Using nCH2=CH2→-[-CH2-CH2-]n-, it can be seen that the chemical equation of high-density polyethylene is mainly composed of carbon and hydrogen elements, while the inertness data of polyethylene is difficult to react with other