Arrangement in an automatic telecommunication exchange, for determining to which of a plurality of service classes a desired connection between two subscribers belongs
摘要
申请公布号
GB737778(A)
申请公布日期
1955.09.28
申请号
GB19530028674
申请日期
1953.10.16
申请人
STAATSBEDRIJF DER POSTERIJEN, TELEGRAFIE EN TELEFONIE
