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发明名称
ELECTRODYNAMIC LOUDSPEAKER
摘要
申请公布号
CA414740(A)
申请公布日期
1943.08.24
申请号
CAD414740
申请日期
申请人
RADIO CORPORATION OF AMERICA
发明人
LUITJE ALONS;N. V. PHILLIPS' GLOEILAMPENFABRIEKEN
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主分类号
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