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发明名称
Procédé et dispositif pour télégraphie à courant alternatif
摘要
申请公布号
FR1048077(A)
申请公布日期
1953.12.18
申请号
FRD1048077
申请日期
1951.09.03
申请人
SIEMENS & HALSKE A. G.
发明人
分类号
H03C3/40;H04L27/00;H04L27/32
主分类号
H03C3/40
代理机构
代理人
主权项
地址
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