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发明名称
Schaltungsanordnung zur Aufnahme akustischer Zeichen
摘要
申请公布号
DE606727(C)
申请公布日期
1934.12.12
申请号
DE1924S065944D
申请日期
1924.05.08
申请人
SIEMENS & HALSKE AKT.-GES.
发明人
分类号
H04R3/00
主分类号
H04R3/00
代理机构
代理人
主权项
地址
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