An electric coupling combined with a variable electric resistance,申请号GB19300019836-传众专利搜索

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发明名称	An electric coupling combined with a variable electric resistance
摘要
申请公布号	GB355883(A)	申请公布日期	1931.09.03
申请号	GB19300019836	申请日期	1930.06.30
申请人	HENRI ROCHAT	发明人
分类号	H01C10/32	主分类号	H01C10/32
代理机构		代理人
主权项
地址

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