fluid displacement tachometer

例句：

1. 1. The fluid displacement tachometer is used to measure the flow rate of a fluid.
   流体位移计用于测量流体的流速。
2. 2. The engineer used the fluid displacement tachometer to monitor the pressure in the pipeline.
   工程师使用流体位移计监测管道中的压力。
3. 3. The fluid displacement tachometer was used to detect any leaks in the system.
   流体位移计被用来检测系统中的任何泄漏。