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发明名称	Druckknopf
摘要
申请公布号	DE640578(C)	申请公布日期	1937.05.19
申请号	DE1935A075460D	申请日期	1935.03.03
申请人	WILHELM ALBERS	发明人
分类号	A44B17/00	主分类号	A44B17/00
代理机构		代理人
主权项
地址

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