铁路线路
railway route
railway lines
rail track
Railway line
railway track
railroad line
Railway
high-speed railway
highway or railway horizontal alignment
铁路线路保护监控装置
integrated protection and control device for railway substation
单线双线铁路
single and double line railway
单线铁路桥
single-line railway bridge
单线铁路隧道
Single track railway tunnel
single line railway tunnel