hydraulic pile driver

例句：

1. 1. The hydraulic pump is responsible for the smooth operation of the machine.
   液压泵负责机器的平稳运行。
2. 2.The hydraulic system is designed to provide a safe and efficient way to transport heavy loads.
   液压系统设计用来安全高效地运输重物。
3. 3. The hydraulic valves are used to control the flow of oil in the engine.
   液压阀用于控制发动机中油的流动。