“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	medicinal resources protection law medicinal resources proteome medicinal resources transcriptome medicinals used singly medicine abortion medicine and health management Medicine for prevention and treatment of stress reaction in wartime medicine for prevention or treatment of impairment caused by bioweapons medicine for war wound treatment medicine in Qin and Han Dynasties medicine in Qing Dynasty medicine in Song Dynasty medicine in Spring and Autumn and Warring states period medicine in Sui,Tang and Fire Dynasties medicine in the Liao,Xia,Jin and Yuan dynasties medicine in the Ming dynasty medicine in Western and Eastern Jin＆Southern and Northern Dynasties medicine in Xia,Shang and Western Zhou Dynasties Medicine King medicine of Chinese ethnic groups Medicine of New Concept Weapons Protection medicine pathogenesis medicine registration standard Medicine River medicine spot cloth

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