A new kind of method to put the theodolite on the crossing point of axes directly and use diagonal ocular to ca.
作者提出用经纬仪直接置于轴线交点上，利用弯管目镜垂直投点到各层轴线交点上。
A new kind of method to put the theodolite on the crossing point of axes directly and use diagonal ocular to ca.
作者提出用经纬仪直接置于轴线交点上，利用弯管目镜垂直投点到各层轴线交点上。
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