Leased line. 基本例句 n.租用线路🌏专线；租用专线；固接专线 The QoS model for HSNet includes three sorts of service: virtual leased line, assured forwarding and best effort. 层次式交换网络支持三种类型服务：虚拟专线业务、确保服务和尽力而为。 cnki The traditional methods are radio, telephone line and leased line. 传统的方法是使用无线电台、电话线或专用通信线。 cnki