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Date: 2014-07-18 12:10:23Mine Safety and Health Administration Safety engineering Safety Longwall mining Geology of England Surface mining Coal Seams of the South Yorkshire Coalfield Bedwas Navigation Colliery Mining Coal mining Underground mining | Mine Safety and Health Administration (MSHA) - Holmes Safety BulletinsAdd to Reading ListSource URL: www.msha.govDownload Document from Source WebsiteFile Size: 2,76 MBShare Document on Facebook |