central reducer unit

例句：

1. 1. Thecentral reducer is responsible for regulating the temperature in the engine compartment.
   中央减压器负责调节发动机舱的温度。
2. 2. Thecentral reducer unit was designed to improvefuel efficiency.
   中央减压器单元被设计用来提高燃油效率。
3. 3. The central reducerunit has been upgraded to meet newemission standards.
   中央减压器单元已经升级以满足新的排放标准。