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发明名称
Improvements relating to the photographic recording of sound
摘要
申请公布号
GB387833(A)
申请公布日期
1933.02.16
申请号
GB19320002393
申请日期
1932.01.26
申请人
BRITISH ACOUSTIC FILMS LIMITED
发明人
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
主权项
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