With developing depth of underground mines increasing, the underground heat harm becomes more and more serious in some non- ferrous & coal mines in China.
我国部分有色和煤炭地采矿山，随着开采深度的增加，井下热害日显严重。
With developing depth of underground mines increasing, the underground heat harm becomes more and more serious in some non- ferrous & coal mines in China.
我国部分有色和煤炭地采矿山，随着开采深度的增加，井下热害日显严重。
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