direction ranging
方向与距离探测系统 direction and range acquisition system
方向区域距离测度 Direction region distance measure
针对圆形物体中心位置的精确测定，提出了基于全站仪或光电测距仪的两种方法：坐标法和方向距离法。
Based on several comparative methods of surveying and fixing of curve, a new method of polar coordinate to calculating the demarcating data is put forward.
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