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发明名称
Braille block
摘要
申请公布号
KR20100003844(U)
申请公布日期
2010.04.12
申请号
KR20080013223U
申请日期
2008.10.02
申请人
发明人
分类号
E01C5/20;E01C5/00;E01C5/16
主分类号
E01C5/20
代理机构
代理人
主权项
地址
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