01358oam 2200373 450 991070565960332120170512133132.0(CKB)5470000002451800(OCoLC)987002301(EXLCZ)99547000000245180020170512d2012 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierReissue of PIB No. P07-21 clarification of requirements for conveyor belt system start-up warnings for 30 CFR ʹʹ 56.14201 and 57.14201[Arlington, Va.] :[U.S. Department of Labor, Mine Safety and Health Administration],2012.1 online resource (2 pages)Program information bulletin ;no. P12-05"Issue date: 03/12/2012."Reissue of PIB No. P07-21 Coal mines and miningUnited StatesSafety measuresCoal-mining machinerySafety regulationsUnited StatesCoal mines and miningSafety measures.Coal-mining machinerySafety regulationsUnited States.Mine Safety and Health Administration,GPOGPOGPOBOOK9910705659603321Reissue of PIB No. P07-213486890UNINA