distance measuring instrument

例句：

1. 1. This isa very useful tool for measuring the distancebetween two points.
   这是一个非常有用的工具，用于测量两点之间的距离。
2. 2. The engineer used adistance measuring instrument to measure the length ofthe tunnel.
   工程师使用一个测距仪来测量隧道的长度。
3. 3. The surveyor useda distance measuring instrument to measure the widthof the road.
   测量员使用一个测距仪来测量道路的宽度。