高速电路交换数据
high speed circuit switched data
HRhigh speed circuit switched data
高速电路交换数据服务
high speed circuit switched data service
高速数据交换网络
high speed switched data network
电路交换数据传输服务
circuit switch data transmission service
circuit-switched data-transmission service
circait-switched data-transmission service
电路交换数据网
circuit switched data network
电路交换数据网络
CSAcircuit switched data network
公用电路交换数据网
Circuit Switched Public Data Network CSPDN
数据电路交换设备
data circuit switching equipment
数据电路交换系统
data circuit switching system
data circuit switch system
增强电路交换数据
enhanced circuit switched data
增强型电路交换数据
enhanced circuit-switched data (ECSD
ECSAenhanced circuit switched data
多兆位数据交换业务
SMDRswitched multimegabit data service
single layer TAB tapeswitched multimegabit data service
高速交换数字服务
high speed switched digital service
HSSDS
电路交换数字网络
crystallographycircuit switched digital network
任务数据交换格式
mission data exchange format
商业数据交换
business data interchange