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发明名称
摘要
申请公布号
JPH02883(U)
申请公布日期
1990.01.05
申请号
JP19880077761U
申请日期
1988.06.14
申请人
发明人
分类号
H04R1/00;B06B1/04;(IPC1-7):H04R1/00
主分类号
H04R1/00
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代理人
主权项
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