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发明名称
Magnetsystem mit einem ringfoermigen permanenten Hauptmagnet mit einer Weicheisenober- und -unterplatte und einem Kern mit Hilfsmagnet
摘要
申请公布号
DE1907969(A1)
申请公布日期
1969.09.25
申请号
DE19691907969
申请日期
1969.02.18
申请人
N.V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
HOFMAN,WYTZE
分类号
H01F7/02;H04R9/02
主分类号
H01F7/02
代理机构
代理人
主权项
地址
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