常見例句雙語例句Butterfly valve through the valve shaft rotation to drive the rotation of a disc-shaped disc, to open and close a valve, cut off from the main pipe and throttle with.進口蝶閥是指通過閥軸旋轉來帶動一個圓盤形的蝶板的轉動，達到開啟與關閉的一種閥門，在管道上主要起切斷和節(jié)流用。 返回 butterfly throttle valve