Input signal of controller is solenoid valve lift. Control parameters are valve opening timing and valve open duration.
控制器的输入信号为电磁阀升程，控制量是气门开启定时和开启持续时间。
The external surface of the directly built-in valve is corrosion resisting treated with epoxy coal bitumen and can be the same duration as the pipeline.
直理式阀门外表面采用环氧煤沥青防腐处理，能与管线同寿命。
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