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发明名称
摘要
申请公布号	DE1486198(U)	申请公布日期	1940.05.23
申请号	DE19391486198U	申请日期	1939.01.16
申请人		发明人
分类号	G04B37/00	主分类号	G04B37/00
代理机构		代理人
主权项
地址

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