“undercutting level”的概念、定义、翻译、参考文献-科学参考

单词	undercutting level
释义	undercutting level Encyclopedia 工学开拓工程释 undercutting level拉底水平为地下矿山回采工作开辟底部自由面，由拉底巷道向两侧扩帮，将矿房底面拉开至足够大，补充爆破空间或者为应力作用下矿石自然崩落创造条件而进行开挖的作业水平。
随便看	Two job settings two-key cryptosystem two kinds of delusions (kleśa) two kinds of educational system two kinds of purity two kinds of substance synthesis into another Two kinds of tax three points two-layer two-layered round lacquer toilet case with nine slots two layer model of fault two-leaved rose lemniscate two-lens objective two-lens ocular Two Letters Working in Coordination two-level two-level adaptive predictor two-level difference scheme two-level laser two level model two-level model two level system two-level system two-level system model two-limited two-line method

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