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flat-back cut and fillの例文

例文

  1. With the mining of no . 1 ore body which is solwly inclined , large and thick at the west flank of xinqiao pyrite mine as the example , analytic comparision is made between flat - back cut and fill stoping and sublevel open stoping with one - time delayed filling . the suggestion on the optimization of the mining and the discussion on appropraite mining method and the technical parameters of mining technology for slowly inclined large and thick ore body are also made

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