The two rails are not only signal lines of track circuits, but also loop current line of locomotive traction current in electrified railway block.
电力牵引区段的两条钢轨，既作为轨道电路的通道来传输信号电流，又作为牵引电流的回路来传送牵引电流。
Railway applications - Fixed installations - Electric traction overhead contact lines.
铁路设施。固定装置。电气牵引架空接触线。
Briefly introduces the basic principles for at post differential current protection of traction power supply system in Shijiazhuang-Taiyuan passenger dedicated lines.
对石太客运专线牵引供电系统AT所差动电流保护的基本原理进行了简要介绍。
By the end of 2015, all railway trunk lines had realized diesel and electric locomotive traction; types and structures of passenger and freight transport vehicles had been upgraded and updated.
截至2015年年底，铁路主要干线全部实现内燃、电力机车牵引，客货运输车辆品种和结构均实现升级换代。
By the end of 2015 all railway trunk lines had realized diesel and electric locomotive traction; types and structures of passenger and freight transport vehicles had been upgraded and updated.
截至2015年年底，铁路主要干线全部实现内燃、电力机车牵引，客货运输车辆品种和结构均实现升级换代。
The dynamic performance while heavy haul train traction and braking on straight lines, curves and ramps railway road condition;
重载列车在直线、曲线和坡道上牵引、惰行和制动时的动力学性能；
The dynamic performance while heavy haul train traction and braking on straight lines, curves and ramps railway road condition;
重载列车在直线、曲线和坡道上牵引、惰行和制动时的动力学性能；
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