crd工法
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shallow excavation CRD method 浅埋暗挖CRD法
·2,447,543篇论文数据，部分数据来源于NoteExpress
The result indicates that the CRD method is the proper construction method on this condition and gives the proper distance between the second lining and the excavation face.
结果 表明，CRD法是该级围岩条件下的合理工法，同时给出了二次衬砌应滞后掌子面的合理距离。
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