二线交换局  secondary office

串接交换交换  tandem switching exchange

当地自动线路交换机  LACE Local Automatic Circuit Exchange

电路或线路交换  circuit or line switching; switching， circuit or line; switching; circuit or line

非交换线路  nonswitched line

光线路交换  circuit switching

互斥交换线路  exclusive exchange line

交换线路  switched line; exchange line; dial line; dial up line

交换线路呼叫  exchange line call

强奇异交换交换子代数  strongly singular maximal abelian self-adjoint sub

区域自动线路交换机  RACE Regional Automatic Circuit Exchange

时间分开线路交换  TDCS Time Division Circuit Switching

双向线路交换环  bidirectional line switch ring

特设线路交换机  specific switch-board exchange

通信线路交换  communication line switch

线路交换  line switching; circuit switching

线路交换电源供应器  line switching power supplies

线路交换公众数据网络  Circuit-switched Public Data Network

线路交换集中器  line switching concentrator