• The National Institute for Occupational Safety and Health has discovered that modern mining equipment spits out more coal dust, which can intensify a small explosion into a deadly blast.

    职业安全健康研究所发现现代采矿设备出来煤尘可以成为致命的爆炸强化一个小规模爆炸

    youdao

  • The National Institute for Occupational Safety and Health has discovered that modern mining equipment spits out more coal dust, which can intensify a small explosion into a deadly blast.

    职业安全健康研究所发现现代采矿设备出来煤尘可以成为致命的爆炸强化一个小规模爆炸

    youdao

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