hydrostatic mechanical seal

例句：

1. 1.The hydrostatic mechanical seal is used in the pump to prevent leakage.
   水静机械密封被用于泵中以防止泄漏。
2. 2.The hydrostatic mechanical seal is a critical component in the oil well drilling process.
   水静机械密封是油井钻探过程中的一个关键部件。
3. 3. The engineer designed a new hydrostatic mechanical seal to improve efficiency.
   工程师设计了一种新的水静机械密封来提高效率。