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发明名称
Système de signalisation par pulsations sur voies multiples
摘要
申请公布号
FR980673(A)
申请公布日期
1951.05.16
申请号
FRD980673
申请日期
1949.02.21
申请人
THE GENERAL ELECTRIC COMPANY LIMITED
发明人
分类号
H04J3/00
主分类号
H04J3/00
代理机构
代理人
主权项
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