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发明名称
DREHKNOPF FUER TAGESLICHTENTWICKLUNGSDOSEN MIT ZWEI FLUEGELARTIGEN VERLAENGERUNGEN.
摘要
申请公布号
DE1631515(U)
申请公布日期
1951.11.29
申请号
DE195100E2020U
申请日期
1951.09.20
申请人
HANS ESCHER
发明人
HANS ESCHER
分类号
主分类号
代理机构
代理人
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