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发明名称
摘要
申请公布号
JPS4944710(A)
申请公布日期
1974.04.27
申请号
JP19720088162
申请日期
1972.09.01
申请人
发明人
分类号
H04H20/89;H04H40/45;H04R5/04;H04S1/00
主分类号
H04H20/89
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代理人
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