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发明名称
Anordning ved Bordtelefonapparater.
摘要
申请公布号
DK47953(C)
申请公布日期
1933.10.30
申请号
DKD47953
申请日期
1932.12.22
申请人
TELEFONAKTIEBOLAGET L. M. ERICSSON
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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