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发明名称
摘要
申请公布号
KR200310240(Y1)
申请公布日期
2003.04.26
申请号
KR20020038500U
申请日期
2002.12.26
申请人
发明人
分类号
G09B23/22
主分类号
G09B23/22
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代理人
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