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发明名称
BARRERA DE PROTECCION
摘要
申请公布号
ES250467(Y)
申请公布日期
1982.04.01
申请号
ES19670002504U
申请日期
1979.01.16
申请人
发明人
分类号
E01F7/04;(IPC1-7):01F7/04
主分类号
E01F7/04
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代理人
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