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发明名称
Perfectionnements aux systèmes de communication et de signalisation
摘要
申请公布号
FR938252(A)
申请公布日期
1948.09.09
申请号
FRD938252
申请日期
1946.07.10
申请人
THE TELERGISTER CORPORATION
发明人
分类号
G08G5/00;H04L12/18
主分类号
G08G5/00
代理机构
代理人
主权项
地址
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