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发明名称
摘要
申请公布号
JPS5251622(U)
申请公布日期
1977.04.13
申请号
JP19750139894U
申请日期
1975.10.13
申请人
发明人
分类号
H04R1/30;H04R1/00;H04R1/20;(IPC1-7):H04R1/00
主分类号
H04R1/30
代理机构
代理人
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