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发明名称
Bohrverfahren und Einrichtung zur Ausübung des Verfahrens.
摘要
申请公布号
CH683860(A5)
申请公布日期
1994.05.31
申请号
CH19910003267
申请日期
1991.11.08
申请人
HEINZ RENFER
发明人
MATHIS, ANDREA LINARD
分类号
E21B4/14;E21B6/00;E21B6/02;(IPC1-7):E21B1/00
主分类号
E21B4/14
代理机构
代理人
主权项
地址
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