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发明名称
Perfectionnements apportés aux installations du genre de celles comprenant plusieurs postes téléphoniques ou autres susceptibles d'être reliés entre eux
摘要
申请公布号
FR854105(A)
申请公布日期
1940.04.05
申请号
FRD854105
申请日期
1938.12.12
申请人
发明人
MERLES
分类号
H04L12/40
主分类号
H04L12/40
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代理人
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