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发明名称
Verfahren zur Verminderung der Nebensprechkopplungen in Fernsprechkabeln
摘要
申请公布号
DE647148(C)
申请公布日期
1937.06.30
申请号
DE1931H129180D
申请日期
1931.10.31
申请人
HACKETHAL-DRAHT- UND KABEL-WERKE AKT.-GES.
发明人
HAUGWITZ OTTO
分类号
H04B3/34
主分类号
H04B3/34
代理机构
代理人
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地址
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