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发明名称
Teaching device
摘要
申请公布号
KR20120001615(U)
申请公布日期
2012.03.08
申请号
KR20100008944U
申请日期
2010.08.26
申请人
发明人
分类号
G09B7/04;G09B1/40;G09B5/02
主分类号
G09B7/04
代理机构
代理人
主权项
地址
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