track measuring device

例句：

1. 1. The engineer used a track measuring device to measure the distance between the two points.
   工程师使用了一个跟踪测量设备来测量两点之间的距离。
2. 2. The scientist developed a new measuring device that can detect pollutants in the air.
   科学家开发了一种新测量设备，可以检测空气中的污染物。
3. 3. The police department uses a track measuring device to monitor traffic flow and prevent accidents.
   警察局使用一种跟踪测量设备来监控交通流量并预防事故。