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发明名称
ARMAZON DE ENTIBACION PARA GALERIAS DE MINA
摘要
申请公布号
ES231127(Y)
申请公布日期
1979.06.01
申请号
ES19270002311U
申请日期
1976.04.14
申请人
发明人
分类号
E21D11/18;E21D11/22;(IPC1-7):21D/
主分类号
E21D11/18
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代理人
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