底阀 dǐfá foot valve Definitions Defs Origin Strokes Stroke Words Sentences Sents 底阀 底閥 dǐfá foot valve bottom valve or foot valve, typically used at the bottom of a pump suction pipe to prevent backflow
底阀 底閥 dǐfá foot valve bottom valve or foot valve, typically used at the bottom of a pump suction pipe to prevent backflow
