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经营范围
发明名称
Polishing wheel
摘要
申请公布号
US2499643(A)
申请公布日期
1950.03.07
申请号
US19480041821
申请日期
1948.07.31
申请人
DORA HAYS
发明人
HAYS DORA
分类号
B24D9/02
主分类号
B24D9/02
代理机构
代理人
主权项
地址
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