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发明名称
ELECTRO-DYNAMIC CONICAL LOUDSPEAKER
摘要
申请公布号
CA696093(A)
申请公布日期
1964.10.13
申请号
CAD696093
申请日期
申请人
N.V. PHILIPS GLOEILAMPENFABRIEKEN
发明人
WYTZE HOFMAN
分类号
主分类号
代理机构
代理人
主权项
地址
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