• Short-hole shrinkage mining is an effective method for mining steep-thin veins, and it has advantages of high-efficiency and low-waste and simple technology.

    孔留法对急倾斜薄矿脉的矿体开采一种有效的采矿方法具有高效低耗工艺简单等优点

    youdao

  • Short-hole shrinkage mining is an effective method for mining steep-thin veins, and it has advantages of high-efficiency and low-waste and simple technology.

    孔留法对急倾斜薄矿脉的矿体开采一种有效的采矿方法具有高效低耗工艺简单等优点

    youdao

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