01676cam a2200397Ia 4500005951505MiAaHDL20250726000000.0m d cr bn ---auaua800211s1979 dcuao f000 0 eng d(MiU)990059515050106381sdr-miu.990059515050106381(MiU)MIU01000000000000005951505-goog(OCoLC)5970995(MiU)Aleph005951505Publications Distribution Branch, 4800 Forbes Ave., Pittsburgh, Pa. 15213GPOGPOOCLOCLCQBOMRIUtOrBLWBMRA637-AI 28.23:8395Hanson, Bruce D.Effect of symmetric bit wear and attack angle on airborne respirable dust and energy consumption /by Bruce D. Hanson and Wallace W. Roepke.[Washington, D.C.] :Dept. of the Interior, Bureau of Mines,[1979]24 p. :ill. ;27 cm.texttxtrdacontentcomputercrdamediaonline resourcecrrdacarrierReport of investigations / Bureau of Mines ;8395Includes bibliographical references (p. 12).Mode of access: Internet.Mine dusts.http://id.loc.gov/authorities/subjects/sh85085502Coal mines and miningDust control.http://id.loc.gov/authorities/subjects/sh85027366Coal-mining machinery.http://id.loc.gov/authorities/subjects/sh85027388Bits (Drilling and boring)http://id.loc.gov/authorities/subjects/sh85014471Roepke, Wallace W.,author.3901507848193700595150520241218031645.020250726000000.020260308140655.02026-03-09T05:38:06Z2026-03-01T18:30:03ZSDR-MIUmiuALMAprepare.pl-004-009BKsdr-miu.990059515050106381MiUSDRGWLA005951505mdp.39015078481937MIU990059515050106381MIUGWLA20260309googlemdp.390150784819371979pdbibUS fed doc