为保证通信安全，需要对电气化铁路对铁道通信的电磁影响和电磁防护进行研究，从而给铁路现场实际工作提供一定的理论依据。
So it is necessary to do the researches on the interferences on communication by electrified railway, and electromagnetic protection of the communication system in order to pro.
在电气化铁道远动系统中，通信部分是系统的重要组成部分。
Communication is an important part in electrified railway remote control system.
它具有实用、灵活、可靠的特点，并已经在铁道部的光纤通信网现场中推广使用。
And it has shown high application value in the optical fiber communication field of MOR.
交通信号灯采用红、黄、绿三种颜色，是因为早期的交通指挥官模仿铁路工程师所设计的用于铁道系统控制火车的编码系统。
Stoplights are red, yellow, and green, because traffic officials, early on copied the code system railroad engineers devised for track systems controlling the trains.
交通信号灯采用红、黄、绿三种颜色，是因为早期的交通指挥官模仿铁路工程师所设计的用于铁道系统控制火车的编码系统。
Stoplights are red, yellow, and green, because traffic officials, early on copied the code system railroad engineers devised for track systems controlling the trains.
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