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发明名称
Modulateur pour systèmes de signalisation électriques
摘要
申请公布号
FR981034(A)
申请公布日期
1951.05.21
申请号
FRD981034
申请日期
1949.02.17
申请人
THE GENERAL ELECTRIC COMPANY LIMITED
发明人
分类号
H04J3/04
主分类号
H04J3/04
代理机构
代理人
主权项
地址
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