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发明名称
Conversation training machine with the picture and sound contents in hard disk
摘要
申请公布号
KR20080003183(U)
申请公布日期
2008.08.08
申请号
KR20070002035U
申请日期
2007.02.05
申请人
发明人
分类号
G09B5/06;G09B19/06;G11B20/10
主分类号
G09B5/06
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代理人
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