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发明名称
Improvements in talking machines
摘要
申请公布号
GB339647(A)
申请公布日期
1930.12.09
申请号
GB19290027361
申请日期
1929.09.09
申请人
MAX PAUL
发明人
分类号
G11B17/00
主分类号
G11B17/00
代理机构
代理人
主权项
地址
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