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Energy / Mountaintop removal mining / Coal mining / Physical universe / Allegany County /  Maryland / Canonsburg /  Pennsylvania / Consol Energy / Massey Energy / Business / Mining / Coal


January 2014 VOL. 66 NO. 1 British Columbia’s New Afton mine US mine safety performance Mining automation technology
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Document Date: 2014-01-20 12:28:35


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File Size: 3,18 MB

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