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发明名称
ELECTROACOUSTIC TRANSDUCER
摘要
申请公布号
GB2000940(A)
申请公布日期
1979.01.17
申请号
GB19780028933
申请日期
1978.07.05
申请人
HITACHI LTD
发明人
分类号
H04R7/04;H04R7/12;H04R7/26;H04R9/04;H04R9/06;(IPC1-7):H04R9/02
主分类号
H04R7/04
代理机构
代理人
主权项
地址
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