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发明名称
Systèmes de transmission de signaux électriques
摘要
申请公布号
FR888195(A)
申请公布日期
1943.12.06
申请号
FRD888195
申请日期
1942.01.10
申请人
LE MATERIEL TELEPHONIQUE
发明人
分类号
H04B1/66;H04J3/18;H04L25/49;H04N7/12
主分类号
H04B1/66
代理机构
代理人
主权项
地址
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