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发明名称
Automatisch geregelte Zweiwegverstärker, vorzugsweise für Telephonanlagen mit Lautsprechertelephonen, wie Cheftelephonanlagen u. dgl.
摘要
申请公布号
AT193950(B)
申请公布日期
1957.12.10
申请号
ATD193950
申请日期
1955.02.24
申请人
SVENSKA RELAEFABRIKEN AB
发明人
分类号
主分类号
代理机构
代理人
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地址
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