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发明名称
Fréquencemètres
摘要
申请公布号
FR990821(A)
申请公布日期
1951.09.26
申请号
FRD990821
申请日期
1949.05.11
申请人
SOCIETE D'ELECTRONIQUE ET D'AUTOMATISME
发明人
分类号
G01R23/00
主分类号
G01R23/00
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