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发明名称
摘要
申请公布号
JPS4990073(A)
申请公布日期
1974.08.28
申请号
JP19730002506
申请日期
1972.12.27
申请人
发明人
分类号
H04L27/227;H03D5/00
主分类号
H04L27/227
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代理人
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地址
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