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082 _a622.4 U58
100 _aU.S. DEPARTMENT OF COMMERCE (NATIONAL TECHNICAL INFORMATION
245 0 _aERGONOMICS OF THE MAINTENANCE OF MINING EQUIPMENT INCLUDING ERGONOMIC PRINCIPLES
260 _aSPRINGFIELD
_bU.S.DEPT.OF COMMERCE
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300 _a29X23
942 _cBK
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