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发明名称
Anordnung zur Vergleichsmessung und zum Abgleich zweier Wechselspannungen, insbesondere fuer Pegelmessungen in Fernkabelverbindungen
摘要
申请公布号
DE525321(C)
申请公布日期
1931.05.22
申请号
DE1926S076259D
申请日期
1926.09.22
申请人
SIEMENS & HALSKE AKT.-GES.
发明人
分类号
H04B3/48
主分类号
H04B3/48
代理机构
代理人
主权项
地址
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