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发明名称
PERFECCIONAMIENTOS EN LAS INSTALACIONES DE MAQUINARIA PARA MINAS.
摘要
申请公布号
ES348240(A1)
申请公布日期
1969.03.01
申请号
ES19400003482
申请日期
1967.11.30
申请人
KOPALNIA WEGLA KAMIENNEGO (KNUROW)
发明人
分类号
E21C29/20;(IPC1-7):E21C/
主分类号
E21C29/20
代理机构
代理人
主权项
地址
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