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本文结合一高层建筑轴线竖向投测介绍内控法中的J2经纬仪带90°弯管目 镜天顶准直法测量的方法
In this paper, a vertical survey of the axis of a high-rise building is introduced to introduce a method for measuring the J2 theodolite with 90° elbow zenith collimation in the internal control method.