02027nam 2200493 a 450 991069931930332120230902162028.0(CKB)5470000002402726(OCoLC)779348850(EXLCZ)99547000000240272620120306d2008 ua 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierCollapsible drill steel enclosure for reducing roof bolting machine drilling noise[electronic resource][Pittsburgh, PA] :Dept. of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health,[2008]1 online resource (2 unnumbered pages) color illustrationsTechnology news ;no. 532DHHS (NIOSH) publication ;no. 2008-146Title from PDF caption (viewed Mar. 6, 2012)."September 2008."Technology news (National Institute for Occupational Safety and Health) ;no. 532.DHHS publication ;no. (NIOSH) 2008-146.Mine roof boltingEquipment and suppliesMine roof boltingSafety measuresBoringEquipment and suppliesBoringSafety measuresNoise controlEquipment and suppliesDeafness, Noise inducedPreventionMine roof boltingEquipment and supplies.Mine roof boltingSafety measures.BoringEquipment and supplies.BoringSafety measures.Noise controlEquipment and supplies.Deafness, Noise inducedPrevention.National Institute for Occupational Safety and Health.GPOGPOBOOK9910699319303321Collapsible drill steel enclosure for reducing roof bolting machine drilling noise3148866UNINA