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发明名称
ANRUFBEANTWORTER ZUM ANSCHLUSS AN FERNSPRECHSTELLEN.
摘要
申请公布号
DE1867462(U)
申请公布日期
1963.02.21
申请号
DE196200S1961U
申请日期
1962.07.25
申请人
SENNHEISER ELEKTRONIC DR.-ING. FRITZ SENNHEISER
发明人
分类号
主分类号
代理机构
代理人
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