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经营范围
发明名称
Abrasive composition
摘要
申请公布号
US2201700(A)
申请公布日期
1940.05.21
申请号
US19390251529
申请日期
1939.01.18
申请人
NELSON HENRY P
发明人
NELSON HENRY P.
分类号
B24D3/12;E04F15/02
主分类号
B24D3/12
代理机构
代理人
主权项
地址
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