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发明名称
摘要
申请公布号
JPS57195186(U)
申请公布日期
1982.12.10
申请号
JP19810082650U
申请日期
1981.06.06
申请人
发明人
分类号
H04R27/00;G08B5/22;G08G1/127;G09D1/00;G09F25/00;(IPC1-7):G09F25/00
主分类号
H04R27/00
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代理人
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