block for preventing sliding of ballast of railroad and for drainage,申请号KR20020035730-传众专利搜索

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发明名称	block for preventing sliding of ballast of railroad and for drainage
摘要
申请公布号	KR100478975(B1)	申请公布日期	2005.03.25
申请号	KR20020035730	申请日期	2002.06.25
申请人		发明人
分类号	E01B1/00;(IPC1-7):E01B1/00	主分类号	E01B1/00
代理机构		代理人
主权项
地址

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