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发明名称
Drehbohr-Hohlgestaenge
摘要
申请公布号
DE1100565(B)
申请公布日期
1961.03.02
申请号
DE1958H032074
申请日期
1958.01.08
申请人
HELEN R. HILL
发明人
HILL JAMES EDWIN
分类号
E21B17/07
主分类号
E21B17/07
代理机构
代理人
主权项
地址
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