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发明名称
摘要
申请公布号	US1874982(A)	申请公布日期	1932.08.30
申请号	USD1874982	申请日期
申请人		发明人
分类号	H03C3/28	主分类号	H03C3/28
代理机构		代理人
主权项
地址

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