本文主要介绍国内外倾斜长壁采煤法的使用概况及发展趋势。
The paper gives a brief account of the use and developing tendency of the inclined longwall coal-mining at home and abroad.
本文主要介绍国内外倾斜长壁采煤法的使用概况及发展趋势。
The paper gives a brief account of the use and developing tendency of the inclined longwall coal-mining at home and abroad.
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