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发明名称
Stossbohrer
摘要
申请公布号
DE865289(C)
申请公布日期
1953.02.02
申请号
DE1948P019487
申请日期
1948.10.26
申请人
RIP-BITS
发明人
GRIFFITHS HUGH MANTON
分类号
E21B17/04
主分类号
E21B17/04
代理机构
代理人
主权项
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