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发明名称
Perfectionnements concernant les systèmes téléphoniques automatiques
摘要
申请公布号
FR933089(A)
申请公布日期
1948.04.09
申请号
FRD933089
申请日期
1946.08.29
申请人
AUTOMATIC TELEPHONE & ELECTRIC COMPANY LIMITED
发明人
分类号
H04Q1/50;H04Q3/00
主分类号
H04Q1/50
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代理人
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