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发明名称
Improvement in dictating machines
摘要
申请公布号
GB428650(A)
申请公布日期
1935.05.16
申请号
GB19340017153
申请日期
1934.06.09
申请人
DICTAPHONE CORPORATION
发明人
分类号
主分类号
代理机构
代理人
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