“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	concentration compactness lemma Ⅱ concentration compactness principle concentration-compactness principle concentration constant concentration control coefficient concentration control coefficients，CCCs concentration control of pollutant concentration criterion of ore concentration cylinder concentration-dependent antibiotics concentration-dependent antimicrobial agents concentration direct reading concentration ellipse concentration equipment concentration factor concentration for 50% of maximal effect concentration function concentration gradient field concentration index concentration in situ concentration interval concentration limit concentration measure concentration measurement concentration of capital

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