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发明名称
Perfectionnement aux rails de chemins de fer
摘要
申请公布号
FR715771(A)
申请公布日期
1931.12.09
申请号
FRD715771
申请日期
1931.04.21
申请人
SOCIETE MICHELIN ET COMPAGNIE
发明人
分类号
E01B25/00
主分类号
E01B25/00
代理机构
代理人
主权项
地址
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