• The paper provided an economic and practical self-rescuer relay emergency refuge method. The personnel into the mine shall wear the compressed oxygen self-rescuer.

    提出经济实用自救接力紧急避险方法人员佩戴压缩自救器;

    youdao

  • The paper provided an economic and practical self-rescuer relay emergency refuge method. The personnel into the mine shall wear the compressed oxygen self-rescuer.

    提出经济实用自救接力紧急避险方法人员佩戴压缩自救器;

    youdao

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