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The wall rock of mining roadway in Xishimen Iron Ore Mine was seriously deformed and broken in complex forms.
西石门铁矿回采巷道围岩变形破坏严重,破坏形式复杂。
youdao
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The wall rock of mining roadway in Xishimen Iron Ore Mine was seriously deformed and broken in complex forms.
西石门铁矿回采巷道围岩变形破坏严重,破坏形式复杂。
youdao