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.
用一辅助凸透镜与一测微目镜进行平行光束的会聚，测出准直管玻罗板线对在辅助凸透镜焦平面上所成像的大小；
Then using another convex lens and a micrometer eyepiece the altered parallel rays is focused, and the imaging size of line pair of collimator imaged on the another convex lens is measured.
操纵台电源打开后左目镜数码二极管无显示；
No display of left eyepiece digital diode after power of console is on;
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