01318nam 2200337Ka 450 991069640660332120080403151540.0(CKB)5470000002378780(OCoLC)218511888(EXLCZ)99547000000237878020080403d2000 ua 0engtxtrdacontentcrdamediacrrdacarrierOre Pass Level and Blockage Locator Device[electronic resource][Spokane, WA] :U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health,[2000]2 unnumbered pages digital, PDF fileTechnology news ;no. 479Title from title screen (viewed on Mar. 12, 2008)."Milestones in Mining Safety and Health Technology.""January 2000."Ore handlingUnited StatesEquipment and suppliesOre handlingEquipment and supplies.Spokane Research Laboratory (National Institute for Occupational Safety and Health)GPOGPOBOOK9910696406603321Ore Pass Level and Blockage Locator Device3109923UNINA