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发明名称
Perfectionnements aux systèmes et aux appareils de télégraphie, de signalisation et aux systèmes et appareils de sélection analogues
摘要
申请公布号
FR802689(A)
申请公布日期
1936.09.10
申请号
FRD802689
申请日期
1936.01.28
申请人
发明人
SIMS VICTOR
分类号
H04L17/12
主分类号
H04L17/12
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代理人
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