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发明名称
Perfectionnement aux systèmes téléphoniques
摘要
申请公布号
FR1079267(A)
申请公布日期
1954.11.29
申请号
FRD1079267
申请日期
1953.04.30
申请人
WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
分类号
H04Q3/58
主分类号
H04Q3/58
代理机构
代理人
主权项
地址
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