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发明名称
ASSISTANCE FOR STUDYING
摘要
申请公布号
KR20060070689(A)
申请公布日期
2006.06.26
申请号
KR20040109263
申请日期
2004.12.21
申请人
GIL, SANG BOK
发明人
GIL, SANG BOK
分类号
G09B19/00;G09B17/02;G09B19/06
主分类号
G09B19/00
代理机构
代理人
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