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发明名称
A Talking Teaching Device with a Laser Pointer Device
摘要
申请公布号
KR100881645(B1)
申请公布日期
2009.02.04
申请号
KR20070026362
申请日期
2007.03.17
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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