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发明名称
PERFECCIONAMIENTOS INTRODUCIDOS EN LOS CARRILES Y RUEDAS DEL FERROCARRIL
摘要
申请公布号
ES233650(A1)
申请公布日期
1957.06.01
申请号
ES19500002336
申请日期
1957.02.15
申请人
GUILLEN DE LA HAZA, MANUEL
发明人
分类号
(IPC1-7):B61
主分类号
(IPC1-7):B61
代理机构
代理人
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地址
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