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发明名称
摘要
申请公布号
JPS557975(B2)
申请公布日期
1980.02.29
申请号
JP19730144556
申请日期
1973.12.27
申请人
发明人
分类号
H04L5/16;H04L5/18;H04L13/00;H04L25/00;H04L29/08
主分类号
H04L5/16
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代理人
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