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发明名称
Multi-Function Improved Concrete Sleeper
摘要
申请公布号
KR200393763(Y1)
申请公布日期
2005.08.30
申请号
KR20050008911U
申请日期
2005.03.31
申请人
发明人
分类号
E01B3/00;(IPC1-7):E01B3/00
主分类号
E01B3/00
代理机构
代理人
主权项
地址
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