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发明名称
Transmission d'appel pour téléphonie automatique sur lignes de télécommunication
摘要
申请公布号
FR749247(A)
申请公布日期
1933.07.20
申请号
FRD749247
申请日期
1932.04.08
申请人
LIGNES TELEGRAPHIQUES ET 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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地址
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