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发明名称
MOSAIC DIAMOND DRAG BIT CUTTER HAVING A NONUNIFORM WEAR PATTERN
摘要
申请公布号
US5238074(A)
申请公布日期
1993.08.24
申请号
US19920817861
申请日期
1992.01.06
申请人
BAKER HUGHES INCORPORATED
发明人
TIBBITTS, GORDON A.;JOHNS, KENNETH
分类号
E21B10/46;E21B10/56;E21B10/567;E21B10/62
主分类号
E21B10/46
代理机构
代理人
主权项
地址
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