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经营范围
发明名称
Expanding bit screw driver
摘要
申请公布号
US2560912(A)
申请公布日期
1951.07.17
申请号
US19470757882
申请日期
1947.06.28
申请人
GEORGE AITTO
发明人
AITTO GEORGE
分类号
B25B23/10
主分类号
B25B23/10
代理机构
代理人
主权项
地址
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