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发明名称
KONTINUIERLICHVERSTELLBARE AUS VIER KANTEN BESTEHENDE OPTISCHE BLENDE MIT RECHTECKIGEM AUSSCHNITT.
摘要
申请公布号
DE1699251(U)
申请公布日期
1955.05.26
申请号
DE195500P7813U
申请日期
1955.02.09
申请人
PHYWE AKTIENGESELLSCHAFT
发明人
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主分类号
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