A summer job developing railwaysignalling systems had given him a taste for working in the real world.
通过一个开发铁路信号系统的暑期工作，Ted初尝了为现实世界工作的滋味。
2
Fixed railway installations. equipment for overhead telecommunication and signalling lines. plate for securing cross - pieces to reinforced concrete posts.
铁路固定设备。通讯和信号装置架空线路用器材。钢筋混凝土电杆上横梁固定用板。
3
Station Interlocking System is one of the most important systems in railwaysignalling.