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发明名称
Improvements in and relating to gramophone pick-up devices
摘要
申请公布号
GB381275(A)
申请公布日期
1932.10.06
申请号
GB19310022012
申请日期
1931.08.01
申请人
FERRANTI, LIMITED;HAROLD VINCENT CARLISLE
发明人
分类号
H04R11/08
主分类号
H04R11/08
代理机构
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