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发明名称
LEUCHTKASTEN ZUR BETRACHTUNG VON DIAPOSITIVEN
摘要
申请公布号
DE6801542(U)
申请公布日期
1969.02.13
申请号
DE19680001542U
申请日期
1968.10.09
申请人
COLOR-STUDIOS DUESSELDORF TH. H. LANGKOPF & CO
发明人
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主分类号
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