A regulated opening for discharging a liquid, as in a stopcock.
控制通过入口的液体量的阀.
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.
If a water-pipe bursts turn off the stopcock immediately.
水管破裂时要立即关紧旋塞.
We must take considered action. burette with three-way stopcock
我们一定要三思而行。带三路活塞的滴定管
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