periscope range finder

例句：

1. 1.The periscope range finder helped us to survey the entire area.
   全景测距仪帮助我们全面调查了整个区域。
2. 2.The periscope range finder is a useful tool for surveying large areas.
   全景测距仪是勘测大面积地区的一种有用的工具。
3. 3.The periscope range finder was used to measure the distance between two points on the map.
   全景测距仪被用来测量地图上两点之间的距离。