• The technique of primary drilling and blasting is an effective way to solve the problem of crushing, caving and transportation.

    方法爆技术解决顶煤破碎顺利放出的有效途径之一。

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  • The primary and secondary dry crushing and associated dry screening systems are designed and sized to operate 6000 hours per year or 68.5 percent of total time.

    初级次级破碎配套系统设计规模确定,依据每年运行6000小时时间的68.5%。

    youdao

  • The primary and secondary dry crushing and associated dry screening systems are designed and sized to operate 6000 hours per year or 68.5 percent of total time.

    初级次级破碎配套系统设计规模确定,依据每年运行6000小时时间的68.5%。

    youdao

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