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发明名称
Systèmes de transmission électriques
摘要
申请公布号
FR882217(A)
申请公布日期
1943.05.21
申请号
FRD882217
申请日期
1942.05.20
申请人
LE MATERIEL TELEPHONIQUE
发明人
分类号
H04Q1/442;H04Q3/00
主分类号
H04Q1/442
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