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发明名称
Improvements in mechanism for the reproduction of sound
摘要
申请公布号
GB361841(A)
申请公布日期
1931.11.18
申请号
GB19300024627
申请日期
1930.08.18
申请人
FREDERICK WILLIAM LANCHESTER
发明人
分类号
G10K13/00
主分类号
G10K13/00
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代理人
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