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发明名称
Vorrichtung zum Niederbringen einer Verrohrung in Bohrlöchern
摘要
申请公布号
CH434133(A)
申请公布日期
1967.04.15
申请号
CH19650005676
申请日期
1965.04.23
申请人
BADE & CO. GMBH
发明人
WIPPIG,WERNER
分类号
E21B3/025;(IPC1-7):E02D7/22
主分类号
E21B3/025
代理机构
代理人
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