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发明名称
Improvements in or relating to electro-acoustic transducers
摘要
申请公布号
GB809481(A)
申请公布日期
1959.02.25
申请号
GB19560010928
申请日期
1956.04.10
申请人
ROLA CELESTION LIMITED
发明人
YOUNG ARTHUR CHARLES
分类号
H04R9/02
主分类号
H04R9/02
代理机构
代理人
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地址
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