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发明名称	RECHENHILFE.
摘要
申请公布号	DE1602558(U)	申请公布日期	1950.03.02
申请号	DE194800D6977U	申请日期	1948.12.13
申请人	WALTER MAAS	发明人	WALTER MAAS
分类号		主分类号
代理机构		代理人
主权项
地址

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