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发明名称
FREMGANGSMAATE VED FORANDRING AV BORERETNING OG VERKTOEY TIL BRUK FOR SLIK FORANDRING
摘要
申请公布号
NO921623(D0)
申请公布日期
1992.04.27
申请号
NO19920001623
申请日期
1992.04.27
申请人
CLAYTON, CHARLEY H.
发明人
CLAYTON, CHARLEY H.
分类号
E21B7/06;E21B7/08;E21B23/06;E21B33/127;(IPC1-7):E21B/
主分类号
E21B7/06
代理机构
代理人
主权项
地址
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