“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	main band Main Bank System main beam main-beam efficiency main belt main-belt asteroid main-belt comet mainboard mainboard, masterboard, motherboard main body Main Botanical Garden of Moscow, Russian Academy of Sciences main branch main-branch library system of Dongguan Library main-branch library system of Suzhou Library main bridge type main building of terminal Main Building of Tianjin West Station maincenter main chain main chain liquid crystalline polymer main-chain liquid crystalline polymer main check line comparison Main Chinese chess scores main circuit main circuit breaker of electric locomotive

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