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发明名称
Einsatz einer Gegensprechanlage zur Verbesserung der Sprachverständlichkeit
摘要
申请公布号
DE9310435(U1)
申请公布日期
1993.12.09
申请号
DE19930010435U
申请日期
1993.07.13
申请人
LEHMANN, JOERG, 22846 NORDERSTEDT, DE
发明人
分类号
H04B1/38;(IPC1-7):H04B1/38
主分类号
H04B1/38
代理机构
代理人
主权项
地址
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