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发明名称
摘要
申请公布号
JPS5780994(U)
申请公布日期
1982.05.19
申请号
JP19800157650U
申请日期
1980.11.04
申请人
发明人
分类号
H04R3/00;G08B5/36;G08B21/00;G09F13/20;H01L33/00
主分类号
H04R3/00
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代理人
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