Improvements in travelling wave tubes,申请号GB19490024749-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	GB678723(A)	申请公布日期	1952.09.10
申请号	GB19490024749	申请日期	1949.09.27
申请人	PHILIPS ELECTRICAL LIMITED	发明人
分类号	H01J25/38	主分类号	H01J25/38
代理机构		代理人
主权项
地址

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