低品位黄铜矿矿石
Low-grade chalcopyrite ore
低品位氧化铜矿石
oxidation of low-grade copper ore
斑岩型低品位铜钼矿
porphyry-type low-grade copper-molybdenum ore
表外低品位矿
low-grade submarginal ore
低品位石油储量
poor quality oil reserves
尾矿低品位锡石再回收
recovery of the low-grade cassiterite in tailings
中低品位矿
middle and low grade bauxite
矿石品位分类装置
ore grading and sorting assembly