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经营范围
发明名称
DIGITAL MULTI GROUP LEARNING MACHINE
摘要
申请公布号
KR200422569(Y1)
申请公布日期
2006.07.27
申请号
KR20060012288U
申请日期
2006.05.09
申请人
发明人
分类号
G09B5/06;G09B5/00
主分类号
G09B5/06
代理机构
代理人
主权项
地址
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