Fréquencemètre différentiel électronique,申请号FRD1056315-传众专利搜索

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发明名称	Fréquencemètre différentiel électronique
摘要
申请公布号	FR1056315(A)	申请公布日期	1954.02.25
申请号	FRD1056315	申请日期	1952.02.16
申请人	ROCHAR	发明人
分类号	G01R23/00	主分类号	G01R23/00
代理机构		代理人
主权项
地址

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