plug cock

• 塞嘴,旋塞,油塞

plug cock的用法和样例：

例句

1. The test cock is on the inlet side of the shutoff valve.
   测试旋塞位于关闭阀的进口一侧上。
2. Manually operated ball valves and closed bottom taper plug valves for gas installations for buildings.
   建筑物气体装置用手工操作球阀和死底锥形旋塞。