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发明名称
Traverse en béton pour chemin de fer
摘要
申请公布号
FR878423(A)
申请公布日期
1943.01.20
申请号
FRD878423
申请日期
1942.01.13
申请人
发明人
RU:PING MAX
分类号
E01B3/42
主分类号
E01B3/42
代理机构
代理人
主权项
地址
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