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发明名称
An aid for alphabet learning
摘要
申请公布号
GB9907070(D0)
申请公布日期
1999.05.19
申请号
GB19990007070
申请日期
1999.03.29
申请人
HAMPSHIRE ADVISORY AND TECHNICAL SERVICES LTD
发明人
分类号
G09B1/14;G09B17/00
主分类号
G09B1/14
代理机构
代理人
主权项
地址
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