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发明名称
Hardness tester
摘要
申请公布号
US2643544(A)
申请公布日期
1953.06.30
申请号
US19510217197
申请日期
1951.03.23
申请人
THE DEVELOPMENT-RESEARCH CORPORATION
发明人
CHESTER MILTON A.
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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