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发明名称
Perfectionnements aux systèmes de transmissions électriques
摘要
申请公布号
FR908705(A)
申请公布日期
1946.04.17
申请号
FRD908705
申请日期
1942.11.13
申请人
COMPAGNIE GENERALE DE CONSTRUCTIONS TELEPHONIQUES
发明人
分类号
H04Q1/446
主分类号
H04Q1/446
代理机构
代理人
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