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发明名称
ACOUSTOELECTRIC TRANSDUCER
摘要
申请公布号
JPH03149997(A)
申请公布日期
1991.06.26
申请号
JP19890287827
申请日期
1989.11.07
申请人
NEC CORP
发明人
HAMA YOSHINORI
分类号
H04R1/44;G01S7/52;G01S7/521
主分类号
H04R1/44
代理机构
代理人
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地址
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