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发明名称
PERFECCIONAMIENTOS EN MAQUINAS PERFORADORAS DE ROCAS CON COLUMNA DE SUJECION.
摘要
申请公布号
ES342204(A1)
申请公布日期
1968.07.16
申请号
ES19040003422
申请日期
1967.06.23
申请人
SIEMENS A. G.
发明人
分类号
E21B;(IPC1-7):E21B/
主分类号
E21B
代理机构
代理人
主权项
地址
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