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发明名称
Sprechmaschine
摘要
申请公布号
DE568810(C)
申请公布日期
1933.01.23
申请号
DED568810D
申请日期
1930.04.05
申请人
L. ROBERT HILGENBERG
发明人
分类号
G11B3/34
主分类号
G11B3/34
代理机构
代理人
主权项
地址
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