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发明名称
Lerngeraet fuer Kinder
摘要
申请公布号
DE1547490(A1)
申请公布日期
1969.11.13
申请号
DE19671547490
申请日期
1967.05.31
申请人
CREMER,CARL
发明人
CREMER,CARL
分类号
G09B1/08
主分类号
G09B1/08
代理机构
代理人
主权项
地址
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