operating piston造句

例句与造句

1. Valve operating piston
   阀动活塞
2. Stopvalves for domestic water supply - part 1 : general requirements and tests for manually operated piston type gate valves , stopvalves for tapping valves , gate valves and diaphragm valves ; technical rule of the dvgw
   家庭用供水截流阀.第1部分:放水阀门阀和隔膜阀用截
3. It's difficult to find operating piston in a sentence. 用operating piston造句挺难的