并对液体的毛细作用、误差精度、钻孔顶角、容器直径引起的误差进行分析。
Also, the paper analyses the error caused by capillary action of liquid, error precision, zenith Angle of hole and container diameter.
从力学观点分析了钻孔方位角和顶角变化的原因；
The reasons for large variations of azimuthal and zenithal angles of holes drilled are investigated with a view point of mechanics.
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