Cathode à chauffage indirect,申请号FRD948446-传众专利搜索

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发明名称	Cathode à chauffage indirect
摘要
申请公布号	FR948446(A)	申请公布日期	1949.08.01
申请号	FRD948446	申请日期	1947.06.10
申请人	SOCIETE INDEPENDANTE DE TELEGRAPHIE SANS FIL	发明人
分类号	H01J1/20	主分类号	H01J1/20
代理机构		代理人
主权项
地址

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