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发明名称
Electromechanical transducer
摘要
申请公布号
US3117189(A)
申请公布日期
1964.01.07
申请号
US19580779669
申请日期
1958.12.11
申请人
ELECTRO-VOICE, INCORPORATED
发明人
KOPP ARTHUR R.
分类号
H04R17/08
主分类号
H04R17/08
代理机构
代理人
主权项
地址
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