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发明名称
Hardness testing indicator
摘要
申请公布号
US2643460(A)
申请公布日期
1953.06.30
申请号
US19480043257
申请日期
1948.08.09
申请人
HARRY W. DIETERT COMPANY
发明人
DIETERT HARRY W.;ADAIR WILLIAM P.;ZIRZOW ELMER C.
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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