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发明名称
Improvements in permanent magnets for loud-speakers or the like
摘要
申请公布号
GB383099(A)
申请公布日期
1932.11.10
申请号
GB19310035929
申请日期
1931.12.30
申请人
AILEEN COLE
发明人
分类号
H04R9/02
主分类号
H04R9/02
代理机构
代理人
主权项
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