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发明名称
DISPOSITIVO PARA CONSTRUIR MEDIANTE ESCUDO TUNELES O GALERIAS
摘要
申请公布号
AR209742(Q)
申请公布日期
1977.05.31
申请号
AR19730249727
申请日期
1973.08.23
申请人
KRISMER J JUN
发明人
分类号
(IPC1-7):E01G3/03
主分类号
(IPC1-7):E01G3/03
代理机构
代理人
主权项
地址
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