发球阀的英文

sphere-lok

• 发球:    serve a ball; serv ...
• 阀:    established house ...
• 球阀:    ball check; ball v ...

例句与用法

1. Pig receiver & launcher shall be horizontal , and the diameter of pig valves shall be equal to the inner diameter of the pipe cleaned
   收发球筒采用卧式平放，收、发球阀的直径应等于被清扫管线的内径。