... 用铅垂线检查…的垂直度用铅垂线测量探测 plumb line 铅垂线偏差 plumb line deviation 黑铅 plumbago ...
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... 垂直于直线 perpendicular to a line 偏离垂直线 plumb line deviation 铅垂；垂直线 plumb line ...
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plumb-line deviation 铅垂线偏差
deviation of plumb line 垂线偏差
·2,447,543篇论文数据，部分数据来源于NoteExpress
It also describes the new techniques and the results drilling tracing of deviation correction in the construction of the bottom of the plumb line hole. Finally, several views are out forward.
介绍了垂线孔孔底随钻跟踪定向纠偏新技术和施工效果，最后结合实例谈几点认识。
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