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经营范围
发明名称
Perfectionnements aux systèmes téléphoniques automatiques
摘要
申请公布号
FR721579(A)
申请公布日期
1932.03.04
申请号
FRD721579
申请日期
1931.08.13
申请人
COMPAGNIE DES TELEPHONES THOMSON-HOUSTON
发明人
分类号
H04Q3/00
主分类号
H04Q3/00
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