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发明名称
Teaching aid for learning reading
摘要
申请公布号
EP1054372(A3)
申请公布日期
2003.12.10
申请号
EP19990120608
申请日期
1999.10.18
申请人
BUTZ, ULRICH
发明人
BUTZ, ULRICH
分类号
G09B17/02;(IPC1-7):G09B17/02
主分类号
G09B17/02
代理机构
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