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发明名称
PROCEDIMIENTO Y APARATO PARA LA CONSTRUCCIoN DE CONDUCTOS DE CAPTACIoN O DRENAJE PARA POZOS
摘要
申请公布号
ES230251(A3)
申请公布日期
1957.04.16
申请号
ES19510002302
申请日期
1956.08.07
申请人
FRESCHEVILLE, GEORGE DE
发明人
分类号
(IPC1-7):E21
主分类号
(IPC1-7):E21
代理机构
代理人
主权项
地址
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