A method of precise levelling under unequal back-and fore-sight length is studied and presented in this paper.
本文研究提出了在前后视距不相等的情况下进行精密水准测量的方法，分析了具体的实测方案。
A method of precise levelling under unequal back-and fore-sight length is studied and presented in this paper.
本文研究提出了在前后视距不相等的情况下进行精密水准测量的方法，分析了具体的实测方案。
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