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发明名称
Perfectionnements aux systèmes de signalisation électrique
摘要
申请公布号
FR41410(E)
申请公布日期
1933.01.10
申请号
FRD41410
申请日期
1932.02.02
申请人
ASSOCIATED TELEPHONE & TELEGRAPH COMPANY
发明人
分类号
H01B3/48;H04Q9/00
主分类号
H01B3/48
代理机构
代理人
主权项
地址
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