... phototopography 摄影测量学 physical distance measurement 物理测距 physical distancemeter 物理测距仪 ...
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So it is suitable for precise measurement of light signal and those that can invert into light signals indirectly, such as position, distance, displace, angle and other relevant physical variables.
可适用于对光信号或是能够间接转化成光信号的物理量，如位置、距离、位移、角度等进行精确测量。
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