backsight 的定义
Surveying.
- a sight on a previously occupied instrument station.
- the reading on a rod that is held on a point of known elevation, used in computing the elevation of the instrument.
更多backsight例句
- The tiny figures seen over the slide of the backsight seemed a little larger, but also fewer at each successive volley.
- "Come quick," he shouted, adjusting the backsight of a rifle.