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发明名称
Drehspülbohrverfahren für Tiefbohrungen
摘要
申请公布号
DE4040155(C2)
申请公布日期
1993.11.25
申请号
DE19904040155
申请日期
1990.12.15
申请人
BRUSSMANN, DIETMAR, 48455 BAD BENTHEIM, DE
发明人
BRUSSMANN, DIETMAR, 48455 BAD BENTHEIM, DE
分类号
E21B7/06;E21B7/10;E21B17/07;E21B17/16;(IPC1-7):E21B7/00;E21B17/00
主分类号
E21B7/06
代理机构
代理人
主权项
地址
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