“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	polyconic projection polyconic projection with meridional intervals on same parallel decrease away from central meridian by equal difference polyconic projection with meridional intervals on same parallel decrease away from central meridian by tangent difference polycrase polycritical point polycrystal polycrystalline polycrystalline diamond compact bit polycrystalline diamond cutting tool polycrystalline ingot polycrystalline material polycrystalline polymer polycrystalline silicon polycrystalline silicon solar cell polycrystal semiconductor polycrystal silicon polycrystal X-ray diffractometry polycube polycyclic polycyclic aromatic hydrocarbon polycyclic aromatic hydrocarbons（PAHs） analysis polycyclic borazine polycyclic dimension polycyclic group polycyclicity

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