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发明名称
DIRECTIONAL TRANSDUCER
摘要
申请公布号
GB2063006(A)
申请公布日期
1981.05.28
申请号
GB19800025585
申请日期
1980.08.06
申请人
HAZELTINE CORP
发明人
分类号
H04R1/20;G01V1/18;H04R1/44;(IPC1-7):H04R1/40;H04R17/00
主分类号
H04R1/20
代理机构
代理人
主权项
地址
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