DIRECTLY HEATED CATHODE,申请号CAD386779-传众专利搜索

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发明名称	DIRECTLY HEATED CATHODE
摘要
申请公布号	CA386779(A)	申请公布日期	1940.02.06
申请号	CAD386779	申请日期
申请人	KURT F. J. KIRSTEN	发明人	KURT F. J. KIRSTEN
分类号		主分类号
代理机构		代理人
主权项
地址

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