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发明名称
Pädagogisch-mathematischer Baukasten
摘要
申请公布号
DE9411208(U1)
申请公布日期
1994.11.03
申请号
DE19940011208U
申请日期
1994.07.13
申请人
SCHAEFER, ROLF, 50129 BERGHEIM, DE
发明人
分类号
G09B23/02;(IPC1-7):G09B23/02
主分类号
G09B23/02
代理机构
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