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发明名称
ZEICHENSCHABLONE FUER EIN MATHEMATISCHES LERNSPIEL
摘要
申请公布号
DE3014743(A1)
申请公布日期
1981.10.22
申请号
DE19803014743
申请日期
1980.04.17
申请人
BATHELT,WOLFGANG
发明人
BATHELT,WOLFGANG
分类号
B43L13/20;(IPC1-7):G09B19/02
主分类号
B43L13/20
代理机构
代理人
主权项
地址
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