valve hood

• 阀盖

valve hood的用法和样例：

例句

1. Screw the cover onto the valve body.
   将阀盖旋在阀体上。
2. All valves have two purges in the valve chest or upper bonnet area.
   所有阀门在阀腔或上部阀盖区域都有两个净化清洗装置。