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发明名称
Rolling cone bit with elements fanned along the gage curve
摘要
申请公布号
AU4613201(A)
申请公布日期
2001.11.22
申请号
AU20010046132
申请日期
2001.05.18
申请人
SMITH INTERNATIONAL, INC.
发明人
YING XIANG;JAMES C. MINIKUS
分类号
E21B10/16;E21B10/52
主分类号
E21B10/16
代理机构
代理人
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地址
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