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发明名称
摘要
申请公布号
JPS5619785(U)
申请公布日期
1981.02.21
申请号
JP19790101500U
申请日期
1979.07.23
申请人
发明人
分类号
G10K9/13;G04C21/02;G10K9/12;H04R1/00;H04R1/02;(IPC1-7):G04C21/02
主分类号
G10K9/13
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