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发明名称
Brönnverktöy med dreiestempel
摘要
申请公布号
NO943368(A)
申请公布日期
1995.04.26
申请号
NO19940003368
申请日期
1994.09.12
申请人
CAMCO INTERNATIONAL INC
发明人
PRINGLE, RONALD EARL
分类号
E21B4/18;E21B17/00;E21B17/10;E21B17/20;G02B6/44;(IPC1-7):E21B7/08;E21B23/00
主分类号
E21B4/18
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代理人
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