01674oam 2200433 a 450 991070137670332120170512102330.0(CKB)5470000002417298(OCoLC)776640697(EXLCZ)99547000000241729820120214d2011 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierDe-energizing a non-intrinsically safe automatic fire sensor and warning systems after a main mine fan stoppage[Arlington, Va.] :[U.S. Dept. of the Interior, Mine Safety and Health Administration],[2011]1 online resource (3 pages)Program information bulletin ;no. P11-51Title from title screen (viewed on Feb. 14, 2012)."Issue date: 11/28/2011."Coal-mining machinerySafety regulationsUnited StatesCoal mines and miningUnited StatesSafety measuresMine ventilationUnited StatesEquipment and suppliesSafety measuresCoal-mining machinerySafety regulationsCoal mines and miningSafety measures.Mine ventilationEquipment and suppliesSafety measures.United States.Mine Safety and Health Administration.GPOGPOOCLCQOCLCOOCLCQGPOBOOK9910701376703321De-energizing a non-intrinsically safe automatic fire sensor and warning systems after a main mine fan stoppage3128888UNINA