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发明名称
Improvements in or relating to methods of and apparatus for recording sound and in sound records
摘要
申请公布号
GB362993(A)
申请公布日期
1931.12.04
申请号
GB19310016362
申请日期
1930.09.04
申请人
WESTERN ELETRIC COMPANY LIMITED
发明人
分类号
G11B7/00
主分类号
G11B7/00
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代理人
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