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发明名称
STEREOPHONISCHE LAUTSPRECHERANORDNUNG MIT ZWEI KANAELEN FUER GESCHLOSSENE RAEUME.
摘要
申请公布号
DE1783254(U)
申请公布日期
1959.02.19
申请号
DE195700T8833U
申请日期
1957.11.13
申请人
TELEFUNKEN G.M.B.H.
发明人
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主分类号
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