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Black Lung: Why Respirators Are Not A Solution : NPRJul 09, 2012· Black Lung: Why Respirators Are Not A Solution Breathing devices may seem useful for protecting coal miners from the toxic dust that causes black lung.
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Research of Comprehensive Protection Device in …X. Dan "Research of Comprehensive Protection Device in Underground Coal Mine Lighting Power Grid", Applied Mechanics and Materials, Vol. 329, pp. 304-307, 2013
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Coal - WikipediaCoal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal ... Disused coal mines can also cause ...