“inner advance heading method”的概念、定义、翻译、参考文献-科学参考

单词	inner advance heading method
释义	inner advance heading method Encyclopedia 工学正洞超前导坑法释 inner advance heading method正洞超前导洞法在隧道施工之前的正洞截面上的某个部位先行开挖一个断面较小的导洞以探明正洞前方地质情况，最后将导洞扩挖为隧道正洞的方法。
随便看	dual theorem dual theory dual throat vector control dual topological group dual transformation dual triangle dual-use land dual value identification method of archives dual variable dual variety dual vector dual vector bundle dual vector space dual voting dual-wall drill pipe dual water supply dual wavelength spectrophotometer dual wavelength weather radar Duan Chaoduan Duan Chenggen Duan chengji Duan Chunlin Duane Hanson Duane Michals Duan Ermiao

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