eddy-current speed indicator

例句：

1. 1. The eddy-current speed indicator is used to measure theflow of water in a river.
   涡流速度指示器用于测量河流中的水流。
2. 2.The engineer used the eddy-current speed indicator to detect any blockagesin the pipeline.
   工程师使用涡流速度指示器来检测管道中任何的堵塞。
3. 3. The eddy-current speedindicator was an essential tool for the surveyor during the construction of the new bridge.
   涡流速度指示器是测绘师在建造新桥过程中必不可少的工具。