Experimental Coal Mine / Roller Mill / MINE SAFETY AND HEALTH ADMININSTRATION PITTSBURGH / /
IndustryTerm
tramp metal / flammable gas / times more energy / pulverized-fuel systems / inert gas / process equipment / sufficient energy / less energy / cement / conveyance equipment / maintained machinery / minimum ignition energy / energy / /
Organization
PENTAGON / United States Bureau / /
Position
coal miner / /
ProvinceOrState
Kentucky / Pennsylvania / Rhode Island / Illinois / /