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发明名称
Sharpening device
摘要
申请公布号
US2778249(A)
申请公布日期
1957.01.22
申请号
US19550507949
申请日期
1955.05.12
申请人
ROBERTS HERBERT L
发明人
ROBERTS HERBERT L.
分类号
B24D15/06
主分类号
B24D15/06
代理机构
代理人
主权项
地址
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