长途线路

随着新的航空业务模式的出现，长途线路航空公司正面临前所未有的挑战。

The long-haul network airlines are being challenged in unprecedented fashion by new aviation business models .

本文介绍了由MCS-51单片机作为从机与PC主机构成的智能化长途通信线路故障诊断系统。

This paper introduces an intelligent instrument for the failure diagnosis of long distance telecommunication line which uses MCS 51 single chip computer as a slave computer and PC as master computer .

铁路长途通信线路施工的新工艺&气吹法敷缆

The New Construction Technology of Long-distance Communicate Lines & Cable Blowing

长途通信线路故障诊断装置

Development of Failure Diagnosis Equipment for Long Distance Telecommunication Line

光缆网络将成为全国长途传输线路的基干。

Now a network of fibers will serve as a national backbone system of longhaul transmission lines .

这项研究在1935年实现了长途电话线路……

This work had resulted in an experimental toll dialling circuit which was certainly operational in 1935 ...

管线网管理的资源范围是电信网络中的省内长途传输线路和本地网线路资源。

The resource scope of duct and line network refers to the provincial long-distance transmission line and local network line resource .

中国正在大举修建地铁，建造需要高速列车的长途高速线路，而高速列车正是欧洲供应商的主打产品。

China is building large numbers of metros and constructing long-distance high-speed lines that require the fast trains , which are among the European suppliers ' flagship products .

接着，详细说明时分多路系统在长途主干线路上的应用，以及最近引伸至市内骨干网和接入网的应用。

Then , it describes in detail the application of WDM systems on long distance lines and possible applications in local networks , including those interoffice lines and some access lines .

长途光传输线路技术的发展

Development of long-distance optical transmission line technologies

分开运作长途和短途线路的原因是，普遍认为二者需要不同的商业模式。

The reason for keeping the two businesses apart is that long-haul and short-haul operations are widely thought to require different business models .

在长途和市内线路，需用高速的单频激光管，而外差检测接收机的本地振荡器和分组交换的波长交换将使用波长调谐的激光管。

High speed single frequency lasers are needed for toll lines and local networks , while wavelength tunable lasers will be used for local oscillators in heterodyne receivers and wavelength switching in packet switches .