stopcock词根词缀

stopcock

[ˈstɒpkɒk]

n.管闩;活塞;活栓;旋塞阀;

复数： stopcocks

例句:

1、

If a water-pipe bursts turn off the stopcock immediately.

水管破裂时要立即关紧旋塞.

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2、

The sealing property is one of the main indicators of kelly stopcock.

密封性能是方钻杆旋塞阀主要指标之一.

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3、

A regulated opening for discharging a liquid, as in a stopcock.

控制通过入口的液体量的阀.

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