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发明名称
An answer-back device for telegraph systems
摘要
申请公布号
GB447715(A)
申请公布日期
1936.05.25
申请号
GB19350023201
申请日期
1935.08.06
申请人
EDWARD ERNST KLEINSCHMIDT
发明人
分类号
H04L12/06
主分类号
H04L12/06
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代理人
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