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发明名称
Improvements in or relating to multi-channel signal transmission systems
摘要
申请公布号
GB474021(A)
申请公布日期
1937.10.25
申请号
GB19370016756
申请日期
1937.06.16
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
分类号
H04J1/04
主分类号
H04J1/04
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代理人
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