A pump USES valves and pistons.

泵使用阀和活塞。

youdao

This results in a cleaner combustion chamber, pistons, spark plugs and valves which results in less wear and tear on these engine components.

这个结果在清洁的燃烧室，活塞、火花塞、阀门，结果在减少磨损和这些发动机零件。

youdao

This results in a cleaner combustion chamber, pistons, spark plugs and valves which results in less wear and tear on these engine components.

这个结果在清洁的燃烧室，活塞、火花塞、阀门，结果在减少磨损和这些发动机零件。

youdao