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发明名称
Perfectionnements apportés aux installations téléphoniques
摘要
申请公布号
FR696312(A)
申请公布日期
1930.12.29
申请号
FRD696312
申请日期
1930.05.30
申请人
TELEFONAKTIEBOLAGET L. M. ERICSSON
发明人
分类号
H04M9/00
主分类号
H04M9/00
代理机构
代理人
主权项
地址
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