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发明名称
Perfectionnement aux transmissions télégraphiques
摘要
申请公布号
FR822878(A)
申请公布日期
1938.01.10
申请号
FRD822878
申请日期
1936.09.18
申请人
SOCIETE INDUSTRIELLE DES TELEPHONES
发明人
分类号
H04L25/05
主分类号
H04L25/05
代理机构
代理人
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