The feasibility of which short-hole shrinkage method is used for mining of low-grade and submarginal ores in Huanren Mine is demonstrated in this paper.
论证了
孔留矿法对桓仁矿北岔区的低品位矿
表外矿进行综合回收的可行性。
词条纠错
X
submarginal
adj. 接近边缘的,在边缘以下的,收益标准以下的
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sub-manager, submandibular, submandibular gland, submanifold, submargin, submarginal, submarine, submarine sandwich, submarineline, submariner,
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