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.
在职业安全与健康研究所发现，现代采矿设备，吐出来的煤尘，它可以成为一个致命的爆炸强化一个小规模的爆炸。
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.
在职业安全与健康研究所发现，现代采矿设备，吐出来的煤尘，它可以成为一个致命的爆炸强化一个小规模的爆炸。
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