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发明名称
Sharpening device
摘要
申请公布号
US2264065(A)
申请公布日期
1941.11.25
申请号
US19390280504
申请日期
1939.06.22
申请人
BROBERG FRED E
发明人
BROBERG FRED E.
分类号
B24B3/54
主分类号
B24B3/54
代理机构
代理人
主权项
地址
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