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发明名称
摘要
申请公布号
DE2050649(A1)
申请公布日期
1972.04.20
申请号
DE19702050649
申请日期
1970.10.15
申请人
TN
发明人
分类号
H04J3/10;(IPC1-7):H04J3/10
主分类号
H04J3/10
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代理人
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