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发明名称
Perfectionnements aux systèmes téléphoniques
摘要
申请公布号
FR1148202(A)
申请公布日期
1957.12.05
申请号
FRD1148202
申请日期
1956.04.26
申请人
SOCIETE DES TELEPHONES ERICSSON
发明人
分类号
H04Q3/42
主分类号
H04Q3/42
代理机构
代理人
主权项
地址
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