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发明名称
Perfectionnements aux appareils de contrôle pour le trafic ferroviaire
摘要
申请公布号
FR951346(A)
申请公布日期
1949.10.21
申请号
FRD951346
申请日期
1947.08.06
申请人
UNION SWITCH & SIGNAL COMPANY
发明人
分类号
B61L23/16
主分类号
B61L23/16
代理机构
代理人
主权项
地址
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