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经营范围
发明名称
Perfectionnements aux systèmes de signalisation pour chemin de fer
摘要
申请公布号
FR950952(A)
申请公布日期
1949.10.12
申请号
FRD950952
申请日期
1947.08.04
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
分类号
B61L1/18
主分类号
B61L1/18
代理机构
代理人
主权项
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