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发明名称
Improvements in or connected with sound reproducing machines
摘要
申请公布号
GB349829(A)
申请公布日期
1931.06.04
申请号
GB19300021868
申请日期
1930.07.19
申请人
ASSOCIATED SOUND FILM INDUSTRIES, LIMITED
发明人
分类号
G03B31/00
主分类号
G03B31/00
代理机构
代理人
主权项
地址
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