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发明名称
The leading braille block for the invisible
摘要
申请公布号
KR200391082(Y1)
申请公布日期
2005.07.29
申请号
KR20050014101U
申请日期
2005.05.16
申请人
发明人
分类号
E01C5/00
主分类号
E01C5/00
代理机构
代理人
主权项
地址
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