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发明名称
Perfectionnements aux installations télégraphiques du type automatique
摘要
申请公布号
FR724082(A)
申请公布日期
1932.04.21
申请号
FRD724082
申请日期
1931.09.11
申请人
INTERNATIONAL INVENTIONS CORPORATION
发明人
分类号
H04L21/00;H04L21/02
主分类号
H04L21/00
代理机构
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