Устройство для записи измерений частоты переменного тока,申请号SU19330139718-传众专利搜索

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发明名称	Устройство для записи измерений частоты переменного тока
摘要
申请公布号	SU40457(A1)	申请公布日期	1934.12.31
申请号	SU19330139718	申请日期	1933.12.29
申请人	CHECHIK N.O.	发明人	CHECHIK N.O.
分类号	G01R23/14	主分类号	G01R23/14
代理机构		代理人
主权项
地址

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