01575oam 2200397 a 450 991070077960332120111130090231.0(CKB)5470000002411208(OCoLC)764569243(EXLCZ)99547000000241120820111130d2009 ua 0engurcn|||||||||txtrdacontentcrdamediacrrdacarrierPotential safety hazard on J.H. Fletcher & Co. roof bolting machines with independent left and right tram levers[electronic resource][Pittsburgh, Pa.] :[U.S. Dept. of Labor, Mine Safety and Health Administration, Pittsburgh Safety & Health Technology Center],[2009]1 online resource (6 unnumbered pages) color illustrationsProgram information bulletin ;no. P09-01Title from title screen (viewed on Nov. 30, 2011)."Issue date: 01/06/2009."Mine roof boltingEquipment and suppliesMine roof boltingSafety measuresMine safetyUnited StatesMine roof boltingEquipment and supplies.Mine roof boltingSafety measures.Mine safetyPittsburgh Safety and Health Technology Center (U.S.)GPOGPOGPOBOOK9910700779603321Potential safety hazard on J.H. Fletcher & Co. roof bolting machines with independent left and right tram levers3217426UNINA