例句與造句

1. As part of the rebuild, IfS / DR mixer preheaters, pressure-compensating piston valves ( Trofimoff valves ) and new " St黨ren " ash pans were installed.
2. For simplicity and light weight, modern sousaphones almost always use three non-compensating piston valves in their construction, in direct contrast to their concert counterparts'large variation in number, type, and orientation.
3. It's difficult to find compensating piston in a sentence. 用compensating piston造句挺難的