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发明名称
Self-centering bit
摘要
申请公布号
US2792726(A)
申请公布日期
1957.05.21
申请号
US19530352919
申请日期
1953.05.04
申请人
VICK SELMER E
发明人
VICK SELMER E.
分类号
B23B49/02
主分类号
B23B49/02
代理机构
代理人
主权项
地址
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