no delay service 无迟延通信

Delay service notifications 延时服务的邮件报警通知

bounded delay service 有界延迟服务

non delay service network 立接制网

delay service switching system 迟接制交换系统

mass service system with delay [计] 等待服务系统

mean service access delay 平均业务接入迟延

Service Access delay 业务接入时延

delay of service 服务延迟