“pilot-heading excavating method”的概念、定义、翻译、参考文献-科学参考

单词	pilot-heading excavating method
释义	pilot-heading excavating method Encyclopedia 工学硐室掘进释 pilot-heading excavating method导硐掘进法硐室岩层不够稳定时，采用先掘进小断面导硐，然后逐次扩大并砌碹的施工方法。
随便看	planetesimal hypothesis planetesimal theory planet-fall planet formation planet-landing planet-like body planet-mass companion planet-mass object planet migration planetocentric celestial sphere planetocentric coordinate planetocentric latitude planetocentric longitude Planet of Snail planetographic celestial sphere planetographic coordinate planetographic latitude planetographic longitude planetography planetoid planetokhod planetologist planetology plane topology plane trace

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