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opencast mining
agric., chem. 露天采矿
desert. 露天开采
expl. 露天矿从地表通过向下阶梯剥离开采金属矿、煤及其他非金属等矿床的作业形式
tech. 露天开采作业
opencast mining Extracting metal ores and minerals that lie near the surface by removing the overlying material and breaking and loading the ore
environ. 露天开采 (通过移去上层物料、爆破和装载矿石，以近地表方式提取金属矿石和矿产品。)
opencast mining: 3 phrases in 2 subjects
Economy1
Technology2

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