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发明名称
Improvements in loud speaker cones
摘要
申请公布号
GB327590(A)
申请公布日期
1930.04.10
申请号
GB19290012284
申请日期
1929.04.20
申请人
WILLIAM EDWARD ASHWORTH;JAMES EDWIN LINNEY
发明人
分类号
H04R7/02
主分类号
H04R7/02
代理机构
代理人
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地址
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