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发明名称
TUBO VIROLADO, DE PARED RECTA, OBTENIDO MEDIANTE EXTENSIoN DE LA PARED
摘要
申请公布号
ES116269(A1)
申请公布日期
1930.02.01
申请号
ES19690001162
申请日期
1929.12.31
申请人
FERRAND, GEORGES AUGUST
发明人
分类号
(IPC1-7):B21
主分类号
(IPC1-7):B21
代理机构
代理人
主权项
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