internal flow counter

例句：

1. 1. The internal flow counter is used tomeasure the amount of water flowing through thepipes.
   内部流量计数器用于测量通过管道的水量。
2. 2. The engineer installed an internal flowcounter to monitor the water flow in thepipelines.
   工程师安装了内部流量计数器来监测管道中的水流。
3. 3. The internalflow counter was used todetect any blockages or leaks in the pipes.
   内部流量计数器被用来检测管道中是否存在堵塞或泄漏。