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发明名称
Vorrichtung und Verfahren zum Niederbringen eines Bohrloches
摘要
申请公布号
DE1171848(B)
申请公布日期
1964.06.11
申请号
DE1960B058172
申请日期
1960.06.09
申请人
BADE & CO. G.M.B.H.
发明人
BADE FRANZ
分类号
E21B3/025;E21B4/16;E21B4/18;E21B4/20;E21B7/20
主分类号
E21B3/025
代理机构
代理人
主权项
地址
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