,申请号BED432711-传众专利搜索

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发明名称
摘要
申请公布号	BE432711(A)	申请公布日期	1939.03.31
申请号	BED432711	申请日期	1939.02.13
申请人		发明人
分类号	H01J37/22;H01J37/26;H01J37/28	主分类号	H01J37/22
代理机构		代理人
主权项
地址

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