constant-pressure pump

例句：

1. 1. The constant-pressure pump is essential for maintaining the water level in the reservoir.
   恒压泵对于保持水库水位至关重要。
2. 2. The constant-pressure pump helps to prevent water leaks and ensure safe operation.
   恒压泵有助于防止水泄漏并确保安全运行。
3. 3. The constant-pressure pump is used to control the flow of water during construction projects.
   恒压泵用于控制建筑项目期间的水流。