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发明名称
Keying
摘要
申请公布号
US1951500(A)
申请公布日期
1934.03.20
申请号
US19300494271
申请日期
1930.11.08
申请人
TELEFUNKEN GESELLSCHAFT FUR DRAHTLOSE TELEGRAPHIE M. B. H.
发明人
BUSCHBECK WERNER
分类号
H04L27/04
主分类号
H04L27/04
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