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发明名称
摘要
申请公布号
JPS55118190(U)
申请公布日期
1980.08.21
申请号
JP19790017936U
申请日期
1979.02.15
申请人
发明人
分类号
H04R17/10;G04C21/02;G10K9/12;H04R1/02;(IPC1-7):G04C21/02
主分类号
H04R17/10
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