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发明名称
Teaching aid
摘要
申请公布号
GB2408837(B)
申请公布日期
2007.05.23
申请号
GB20040022774
申请日期
2004.10.14
申请人
MARY TERESA ANNE COEN
发明人
MARY TERESA ANNE COEN
分类号
G09B11/00;G09B11/04
主分类号
G09B11/00
代理机构
代理人
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地址
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