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发明名称
Traverses de chemins de fer
摘要
申请公布号
FR714428(A)
申请公布日期
1931.11.13
申请号
FRD714428
申请日期
1931.02.19
申请人
发明人
YOKLEY ORANGE
分类号
E01B9/32
主分类号
E01B9/32
代理机构
代理人
主权项
地址
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