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发明名称
Rock drilling bit
摘要
申请公布号
US3269471(A)
申请公布日期
1966.08.30
申请号
US19630325930
申请日期
1963.11.26
申请人
ALEXANDER ROBERT T
发明人
ALEXANDER ROBERT T.
分类号
E21B10/38;E21B10/58
主分类号
E21B10/38
代理机构
代理人
主权项
地址
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