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发明名称
Improvements relating to electro-acoustic transducers
摘要
申请公布号
GB839722(A)
申请公布日期
1960.06.29
申请号
GB19570038063
申请日期
1957.12.06
申请人
SIEMENS EDISON SWAN LIMITED
发明人
BROWN RONALD ERNEST CHARLES
分类号
H04R11/00
主分类号
H04R11/00
代理机构
代理人
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