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发明名称	ASSISTANCE FOR STUDYING
摘要
申请公布号	KR20060070690(A)	申请公布日期	2006.06.26
申请号	KR20040109264	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
主权项
地址

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