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发明名称
Improvements in and relating to loudspeakers
摘要
申请公布号
GB329582(A)
申请公布日期
1930.05.22
申请号
GB19290024955
申请日期
1929.08.15
申请人
SALLY SCHOENBERG
发明人
分类号
H04R9/04
主分类号
H04R9/04
代理机构
代理人
主权项
地址
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