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发明名称
UN PROCEDIMIENTO PARA FABRICAR TRAVIESAS FERROVIARIAS
摘要
申请公布号
ES204011(A1)
申请公布日期
1954.03.01
申请号
ES19110002040
申请日期
1952.06.14
申请人
ETERNIT PIETRA ARTIFICIALE, SOCIETR PER AZIONI
发明人
分类号
(IPC1-7):E01
主分类号
(IPC1-7):E01
代理机构
代理人
主权项
地址
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