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发明名称
摘要
申请公布号
JPS5414889(B2)
申请公布日期
1979.06.11
申请号
JP19730061673
申请日期
1973.05.31
申请人
发明人
分类号
H04H20/89
主分类号
H04H20/89
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代理人
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