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发明名称
Dispositif de liaison téléphonique bilatérale amplifiée
摘要
申请公布号
FR982578(A)
申请公布日期
1951.06.12
申请号
FRD982578
申请日期
1943.07.21
申请人
发明人
PETITETIENNE LUCIEN
分类号
H04M9/08
主分类号
H04M9/08
代理机构
代理人
主权项
地址
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