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发明名称
Schaltungsanordnung zur Herstellung von Sonderbetriebsverbindungen in Fernsprechanlagen mit Waehlerbetrieb
摘要
申请公布号
DE581943(C)
申请公布日期
1933.08.08
申请号
DE1925S071784D
申请日期
1925.10.04
申请人
SIEMENS & HALSKE AKT.-GES.
发明人
HORN ERNST
分类号
H04Q3/58
主分类号
H04Q3/58
代理机构
代理人
主权项
地址
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OBJECT DETECTOR
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LIGHT-EMITTING APPARATUS
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