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发明名称
File sharpening machine
摘要
申请公布号
US2375703(A)
申请公布日期
1945.05.08
申请号
US19440534303
申请日期
1944.05.05
申请人
SWARTZWELDER ALVIN H
发明人
SWARTZWELDER ALVIN H.
分类号
B24B3/60
主分类号
B24B3/60
代理机构
代理人
主权项
地址
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