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发明名称
DRENOS VERTICAIS DE TECNICA SIMPLES
摘要
申请公布号
BR8602977(A)
申请公布日期
1988.02.02
申请号
BR1986PI02977
申请日期
1986.06.27
申请人
REDE FERROVIARIA FEDERAL S.A.
发明人
JOSE EDUARDO SABOIA CASTELLO BRANCO
分类号
E01F5/00;(IPC1-7):E01F5/00
主分类号
E01F5/00
代理机构
代理人
主权项
地址
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