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发明名称
Télégraphie à grand rendement
摘要
申请公布号
FR35351(E)
申请公布日期
1930.03.08
申请号
FRD35351
申请日期
1927.12.12
申请人
发明人
VERDAN CHARLES
分类号
H04L1/08;H04L13/18;H04L17/14
主分类号
H04L1/08
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代理人
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