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发明名称
摘要
申请公布号
JPS56135181(U)
申请公布日期
1981.10.13
申请号
JP19800032957U
申请日期
1980.03.12
申请人
发明人
分类号
H04R17/10;G04C21/02;G10K9/12;G10K9/122;G10K9/22;H04R17/00;(IPC1-7):G04C21/02
主分类号
H04R17/10
代理机构
代理人
主权项
地址
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