Black Lung Disease Coal Dust Occupational Disease 1980 MSHA
2:04
Added: 2 years ago
From: markdcatlin
Views: 8,259
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  • very helpful video. very educational.

    gadionson1 2 months ago

  • 1.39 subliminal message

    elliotbithray 11 months ago

  • Black lung disease is super cool now, all the cool miners are doing it

    bitcheznhos 1 year ago

  • creepy flashing of other parts of the video...O.O

    azntranc3951 2 years ago

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