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经营范围
发明名称
Electromechanical transducer
摘要
申请公布号
GB2194707(A)
申请公布日期
1988.03.09
申请号
GB19870015324
申请日期
1987.06.30
申请人
* REEFGRADE LIMITED
发明人
MARTIN JAMES * LAWRENCE
分类号
H04R9/02;H04R9/04;(IPC1-7):H04R9/02
主分类号
H04R9/02
代理机构
代理人
主权项
地址
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