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发明名称
Improvements in and relating to methods of recording and reproducing sound
摘要
申请公布号
GB434477(A)
申请公布日期
1935.09.02
申请号
GB19330033639
申请日期
1933.11.30
申请人
THE BRITISH THOMSON-HOUSTON COMPANY, LIMITED
发明人
分类号
G11B5/70
主分类号
G11B5/70
代理机构
代理人
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