automatic reducing valve

例句：

1. 1. The automatic reducing valve is used to control the flow of oil in the engine.
   自动减压阀用于控制发动机中油的流动。
2. 2. The engineer replaced the old automatic reducing valve with a new one.
   工程师用一个新的自动减压阀替换了旧的。
3. 3. The automatic reducing valve was designed to improve efficiency and reduce wear on the engine.
   自动减压阀的设计旨在提高效率并减少对发动机的磨损。