而联邦铁路管理局说这种新型“安全控制系统”将只应用在6万5000英里铁路上(铁路总里程约为14万多英里)，但铁路行业估计它将覆盖大半个铁路网络。
Whereas the FRA says that the new safety system will apply to only 65, 000 miles (out of a total of over 140, 000), the industry reckons it will cover more than half the network.
主要介绍综合网管系统的概念，讨论综合网管系统中定制报表的基本原理，实践一个简单的报表定制系统并应用到铁路网络管理系统。
It was introduced the concept of Integrated Network Management system, and also discussed the basic principle of custom report. The custom report system was implemented as a sample of the system.
主要介绍综合网管系统的概念，讨论综合网管系统中定制报表的基本原理，实践一个简单的报表定制系统并应用到铁路网络管理系统。
It was introduced the concept of Integrated Network Management system, and also discussed the basic principle of custom report. The custom report system was implemented as a sample of the system.
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