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发明名称
Perfectionnements aux commutateurs automatiques pour systèmes téléphoniques ou similaires
摘要
申请公布号
FR837441(A)
申请公布日期
1939.02.09
申请号
FRD837441
申请日期
1938.05.02
申请人
ASSOCIATED ELECTRIC LABORATORIES, INC.
发明人
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
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