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发明名称
PERFECCIONAMIENTOS EN DISPOSITIVOS OBTURADORES PARA INYEC- CIONES EN ORIFICIOS DE PERFORACION.
摘要
申请公布号
ES449188(A2)
申请公布日期
1977.08.16
申请号
ES19880004491
申请日期
1976.06.11
申请人
FRANKIGNOUL PIEUX ARMES
发明人
分类号
E02D3/12;E21B33/128;(IPC1-7):E02D/
主分类号
E02D3/12
代理机构
代理人
主权项
地址
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