常見例句

雙語例句

• Butterfly valve is closed parts ( valve flap or disc for disc ), around the valve axis of rotation to achieve the open and close a valve, in the pipeline mainly as shut off and throttling effect.
  蝶閥是指關(guān)閉件（閥瓣或蝶板）為圓盤，圍繞閥軸旋轉(zhuǎn)來達到開啟與關(guān)閉的一種閥，在管道上主要起切斷和節(jié)流作用。
返回 throttling valve disc