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发明名称
Drill bit
摘要
申请公布号
GB948000(A)
申请公布日期
1964.01.29
申请号
GB19600009709
申请日期
1960.03.18
申请人
SANDVIKENS JERNVERKS AKTIEBOLAG
发明人
分类号
E21B10/58
主分类号
E21B10/58
代理机构
代理人
主权项
地址
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