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二倍照准部互差
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二倍照准部互差
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discrepancy between twice collimation error
二倍照准部互差
用经纬仪或全站仪进行水平角测量时,同一目标的盘左读数与盘右读数的差值与180°之差称二倍照准部差。又称二倍照准差。
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