... Azimuthal Grid 地平坐标网格 azimuthal point 方位点 azimuthal measurement 方位测量 ...
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two-point azimuthal projection 大圆投影
The reasons for large variations of azimuthal and zenithal angles of holes drilled are investigated with a view point of mechanics.
从力学观点分析了钻孔方位角和顶角变化的原因;
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