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发明名称
Systèmes télégraphiques
摘要
申请公布号
FR847620(A)
申请公布日期
1939.10.12
申请号
FRD847620
申请日期
1938.12.15
申请人
CREED AND COMPANY LIMITED
发明人
分类号
H04L25/04;H04L25/20;H04L25/26
主分类号
H04L25/04
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