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发明名称
Procédé pour constituer des infrastructures pour voies ferrées
摘要
申请公布号
FR696025(A)
申请公布日期
1930.12.24
申请号
FRD696025
申请日期
1930.05.23
申请人
发明人
DAY WILLIAM PATRICK
分类号
E01B3/38
主分类号
E01B3/38
代理机构
代理人
主权项
地址
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