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发明名称
PERFECCIONAMIENTOS EN LA CONSTRUCCION DE MAQUINAS PERFORADO-RAS PARA SONDEOS.
摘要
申请公布号
ES445214(A1)
申请公布日期
1977.10.01
申请号
ES19140004452
申请日期
1976.02.16
申请人
INDUSTRIAL DE SONDEOS, S. A.
发明人
分类号
E21B;(IPC1-7):21B/
主分类号
E21B
代理机构
代理人
主权项
地址
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