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发明名称
摘要
申请公布号
DE2129328(A1)
申请公布日期
1971.12.23
申请号
DE19712129328
申请日期
1971.06.12
申请人
POST OFFICE
发明人
分类号
H04L1/00;H04L25/04;(IPC1-7):03K13/34
主分类号
H04L1/00
代理机构
代理人
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