“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	complete expense coefficient complete exponential sum complete extension complete factorial design complete factorization complete family complete family of congruences complete family of distributions complete family of homomorphisms complete field complete field of sets complete filter complete filtration complete flag complete flag structure complete flower complete form complete formula complete formula feed complete free resolution complete function complete functor Complete Fu of Tang Dynasty complete fusion complete gamma-function

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