range ladder

例句：

1. 2.
   用于测量的
2. 3.
   用于测量的
3. 1. The rangeladder is used to measure the distance betweentwo points on a map.
   测距仪用于测量地图上两点之间的距离。
4. 2. The range ladderwas used to determine the exact location ofthe target.
   测距仪被用来确定目标的具体位置。
5. 3. The range ladder was used tomeasure the accuracy of the gun'saim.
   测距仪被用来测量枪械瞄准的准确性。