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发明名称
a mosaic board for study
摘要
申请公布号
KR200422573(Y1)
申请公布日期
2006.07.27
申请号
KR20060012396U
申请日期
2006.05.10
申请人
发明人
分类号
G09B1/32;G09B1/40
主分类号
G09B1/32
代理机构
代理人
主权项
地址
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