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经营范围
发明名称
Braille Education Trainer for the Visually Handicapped
摘要
申请公布号
KR101094715(B1)
申请公布日期
2011.12.16
申请号
KR20090047448
申请日期
2009.05.29
申请人
发明人
分类号
G09B21/04;G09B5/04
主分类号
G09B21/04
代理机构
代理人
主权项
地址
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