shell tap

例句：

1. 1.The engineer used a shell tap to open the valve.
   工程师用一个壳式阀门打开了阀门。
2. 2.The shell tap was designed to prevent leaks in the pipeline.
   壳式阀门被设计用来防止管道中的泄漏。
3. 3. The shell tap was a critical component of the new water treatment system.
   壳式阀门是新水处理系统的一个关键部件。