往复活塞密封被机械密封和液力隔膜泵所替代。

Reciprocating plunger seals have been substitute by mechanically or hydraulically actuated diaphragms in diaphragm pumps.

youdao

往复活塞密封被机械密封和液力隔膜泵所替代。

Reciprocating plunger seals have been substitute by mechanically or hydraulically actuated diaphragms in diaphragm pumps.

youdao