stage casing pump

例句：

1. 1.The stage casing pump is usedto control the flow of oil in theengine.
   舞台壳体泵用于控制发动机中油的流动。
2. 2. The stage casing pumpwas designed to improve the efficiency of theengine.
   舞台壳体泵被设计来提高发动机的效率。
3. 3. The stage casing pump isessential for maintaining the proper temperature and pressurein the engine.
   舞台壳体泵对于保持发动机适当的温度和压力至关重要。