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经营范围
发明名称
Hardness tester
摘要
申请公布号
US2628495(A)
申请公布日期
1953.02.17
申请号
US19510237140
申请日期
1951.07.17
申请人
DAY KENNEY M
发明人
DAY KENNEY M.
分类号
G01N3/42
主分类号
G01N3/42
代理机构
代理人
主权项
地址
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