金属矿采选产生的金属污染、矿山酸性废水已成为两大环境公害。
Metal pollution and mine acid water produced in the mining and mineral processing of metal mines have become two major public dangers to environment.
研究结果显示，我国钢铁产业对黑色金属矿采选业后向直接关联效应明显高于其它七国；
The findings show that the backward linkage effect of iron and steel industry on ferrous metal industry in china is pronounced than the relative effect in other seven countries;
研究结果显示，我国钢铁产业对黑色金属矿采选业后向直接关联效应明显高于其它七国；
The findings show that the backward linkage effect of iron and steel industry on ferrous metal industry in china is pronounced than the relative effect in other seven countries;
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