专用线

例句：

1. 1. This is a dedicatedline for emergency calls only.
   这是一条仅供紧急电话使用的专线。
2. 2. The company has established adedicated line for customer service inquiries.
   该公司已为客户服务咨询设立了一个专用线路。
3. 3.The new technology allows us to establish adedicated line for data transmission.
   新技术使我们能够建立一条专用线路进行数据传输。