Учебное наглядное пособие по электротехнике,申请号SU19500430129-传众专利搜索

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发明名称	Учебное наглядное пособие по электротехнике
摘要
申请公布号	SU90934(A1)	申请公布日期	1950.11.30
申请号	SU19500430129	申请日期	1950.06.19
申请人	USHAKOV M.A.	发明人	USHAKOV M.A.
分类号	G09B23/18	主分类号	G09B23/18
代理机构		代理人
主权项
地址

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