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发明名称
PERFECCIONAMIENTOS EN MARTILLOS PERFORADORES
摘要
申请公布号
ES293533(A3)
申请公布日期
1964.01.16
申请号
ES19330002935
申请日期
1963.11.14
申请人
PERFORACIEN, SOCIEDAD ANENIMA
发明人
分类号
E21B4/06;E21B11/02;E21C37/24;(IPC1-7):E21B4/06
主分类号
E21B4/06
代理机构
代理人
主权项
地址
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