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发明名称
PROCEDIMIENTO PARA LA CONSTRUCCION DE OBRAS SUBTERRANEAS EN ZANJA.
摘要
申请公布号
ES443757(A1)
申请公布日期
1977.04.16
申请号
ES19570004437
申请日期
1975.12.22
申请人
ALPINA, S. P. A.
发明人
分类号
E21D;(IPC1-7):21D/
主分类号
E21D
代理机构
代理人
主权项
地址
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