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发明名称
Systèmes de sélection téléphonique utilisant un tube à gaz à décharge pour les circuits de sélection et de conversation combinés et une déconnexion sélective
摘要
申请公布号
FR1048387(A)
申请公布日期
1953.12.22
申请号
FRD1048387
申请日期
1951.07.30
申请人
WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
分类号
H03K17/52;H04Q3/52
主分类号
H03K17/52
代理机构
代理人
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