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发明名称
A study book with teaching schedule
摘要
申请公布号
KR20090011258(U)
申请公布日期
2009.11.04
申请号
KR20080005749U
申请日期
2008.04.30
申请人
发明人
分类号
G09B19/08;G09B11/10
主分类号
G09B19/08
代理机构
代理人
主权项
地址
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