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经营范围
发明名称
Improvements in moving coil loud speakers
摘要
申请公布号
GB408284(A)
申请公布日期
1934.04.03
申请号
GB19320027314
申请日期
1932.10.01
申请人
FRANCIS ROCK CARLING
发明人
分类号
H04R9/02
主分类号
H04R9/02
代理机构
代理人
主权项
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