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发明名称
sleeper for railroad
摘要
申请公布号
KR100868786(B1)
申请公布日期
2008.11.17
申请号
KR20060133981
申请日期
2006.12.26
申请人
发明人
分类号
E01B3/00
主分类号
E01B3/00
代理机构
代理人
主权项
地址
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