ranging line

Laser Ranging technique they use time of flight method, by measuring the optical signals from the flight line at the test time required to measure the distance.

激光测距技术大多采用飞行时间法，通过测量光信号在测线上往返飞行所需的时间来测量距离。

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Through the practice of near shaft-control net at Xinqiao Mine, the optimization of the lay-out of near shaft-net is discussed and the countermeasures for the false closing phenomenon that may exist in the closing line for ranging are proposed.

通过新桥矿业近井点控制网的测设，讨论了近井网布设的优化问题，同时对测距闭合导线有可能存在的伪闭合现象提出了有针对性的对策。

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