hydropneumatic spring

例句：

1. 1. The pump is designed to operate efficiently under hydropneumatic conditions.
   该泵设计用于在水力气动条件下高效运行。
2. 2.The hydraulic system in the factory uses a pneumatic valve to control the flow of oil.
   工厂中的液压系统使用气动阀门来控制油的流动。
3. 3.The pneumatic tire has a high load capacity and can withstand heavy loads.
   这种充气轮胎具有高负载容量，能够承受重载。