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发明名称
Anordnung fuer die zweidraehtige Durchschaltung ohne Verstaerker mit Vierdraht-Fernwahlleitungen mit Verstaerkern
摘要
申请公布号
DE1008784(B)
申请公布日期
1957.05.23
申请号
DE1955D020296
申请日期
1955.04.22
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT;STANDARD ELEKTRIK AKTIENGESELLSCHAFT
发明人
EBENAU DIPL.-ING. WILHELM;BUGDAHN JULIUS
分类号
H04M3/40
主分类号
H04M3/40
代理机构
代理人
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