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发明名称
Apparatus and Method for Generating Layered Lecture Contents
摘要
申请公布号
KR100706901(B1)
申请公布日期
2007.04.12
申请号
KR20050060752
申请日期
2005.07.06
申请人
发明人
分类号
G06Q50/20
主分类号
G06Q50/20
代理机构
代理人
主权项
地址
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