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发明名称
BOHRVORRICHTUNG ZUM ERWEITERN DER SOHLE EINES BOHRLOCHS
摘要
申请公布号
DE1484393(B1)
申请公布日期
1969.10.23
申请号
DE19611484393
申请日期
1961.07.18
申请人
ALLARD PIERRE JEAN MARIE
发明人
ALLARD PIERRE JEAN MARIE
分类号
E21B4/00;E21B4/02;E21B4/04;E21B4/18;E21B7/00;E21B7/28;E21B10/32;E21B10/66;E21B11/04;E21B27/00;(IPC1-7):E02D17/14
主分类号
E21B4/00
代理机构
代理人
主权项
地址
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