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发明名称
Dispositif de comparaison de la fréquence d'un signal par rapport à une fréquence étalon
摘要
申请公布号
FR1057223(A)
申请公布日期
1954.03.05
申请号
FRD1057223
申请日期
1952.05.19
申请人
COMPAGNIE POUR LA FABRICATION DES COMPTEURS ET MATERIEL D'USINES A GAZ
发明人
分类号
G01R23/00
主分类号
G01R23/00
代理机构
代理人
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地址
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