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发明名称
摘要
申请公布号
JPS5218052(B2)
申请公布日期
1977.05.19
申请号
JP19720048125
申请日期
1972.05.17
申请人
发明人
分类号
H04L25/02;H04B3/46;H04L27/00;H04L29/14
主分类号
H04L25/02
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