Improvements in travelling wave tubes,申请号GB19550006521-传众专利搜索

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发明名称	Improvements in travelling wave tubes
摘要
申请公布号	GB781205(A)	申请公布日期	1957.08.14
申请号	GB19550006521	申请日期	1955.03.04
申请人	COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL	发明人
分类号	H01J25/42;H01J25/44	主分类号	H01J25/42
代理机构		代理人
主权项
地址

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