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发明名称
Device for testing materials
摘要
申请公布号
US1787525(A)
申请公布日期
1931.01.06
申请号
US19290360276
申请日期
1929.05.03
申请人
OTTO FOPPL
发明人
HEYDEKAMPF GERD STIELER V.
分类号
G01N3/34
主分类号
G01N3/34
代理机构
代理人
主权项
地址
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