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发明名称
Perfectionnements aux systèmes téléphoniques interurbains automatiques
摘要
申请公布号
FR909514(A)
申请公布日期
1946.05.10
申请号
FRD909514
申请日期
1943.05.12
申请人
COMPAGNIE GENERALE DE CONSTRUCTIONS TELEPHONIQUES
发明人
分类号
H04Q1/446;H04Q3/00
主分类号
H04Q1/446
代理机构
代理人
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