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发明名称
Screw driver conditioner
摘要
申请公布号
US2439839(A)
申请公布日期
1948.04.20
申请号
US19470765355
申请日期
1947.08.01
申请人
BRULPORT GEORGE E
发明人
BRULPORT GEORGE E.
分类号
B24D15/06;G04D3/00
主分类号
B24D15/06
代理机构
代理人
主权项
地址
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