flat slide valve造句

例句与造句

1. All cylinders have flat slide valves and outside Heusinger valve gear with lifting links and Kuhn slides.
2. Ninety eight engines of this class were built by 1907; they initially had flat slide valves, but from 1903 piston valves were installed.
3. It's difficult to find flat slide valve in a sentence. 用flat slide valve造句挺难的