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发明名称
RECHENGERAET FUER KINDER.
摘要
申请公布号
DE1602295(U)
申请公布日期
1950.02.23
申请号
DE194800D2378U
申请日期
1948.10.09
申请人
WILHELM BERGES
发明人
WILHELM BERGES
分类号
主分类号
代理机构
代理人
主权项
地址
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