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发明名称
A device for the blind
摘要
申请公布号
KR20090000916(U)
申请公布日期
2009.02.02
申请号
KR20070012307U
申请日期
2007.07.25
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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