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发明名称
Improvements in or relating to the magnetic systems of sound reproducing apparatus
摘要
申请公布号
GB384055(A)
申请公布日期
1932.12.01
申请号
GB19310031363
申请日期
1931.11.12
申请人
WALTER VOLLMANN
发明人
分类号
H04R11/00
主分类号
H04R11/00
代理机构
代理人
主权项
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