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发明名称
IMPROVEMENTS IN LOUDSPEAKERS
摘要
申请公布号
GB9012818(D0)
申请公布日期
1990.08.01
申请号
GB19900012818
申请日期
1990.06.08
申请人
CARRINGTON, SIMON P
发明人
分类号
主分类号
代理机构
代理人
主权项
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