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发明名称
LARGE DIAMETER DRILL BIT
摘要
申请公布号
AU4910979(A)
申请公布日期
1980.04.17
申请号
AU19790049109
申请日期
1979.07.20
申请人
DRESSER INDUSTRIES, INC.
发明人
THOMAS FRANKLIN YOUNGBLOOD;WILLIAM CRAIG SAXMAN;GERALD FRANKLIN WILEMON
分类号
E21B7/28;E21B10/28
主分类号
E21B7/28
代理机构
代理人
主权项
地址
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