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发明名称
A teaching aid
摘要
申请公布号
AU762605(B2)
申请公布日期
2003.06.26
申请号
AU19990061150
申请日期
1999.10.11
申请人
KEYWISE SYSTEMS UK, LIMITED
发明人
DAVID DODD
分类号
G09B1/06;G09B3/04;G09B13/02;G09B19/02;(IPC1-7):G09B13/02
主分类号
G09B1/06
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代理人
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