信号通常通过电线机械地工作The control centre for signalling trains. This is where the signallers control the movements of trains by signals.
" class="glossaryLink ">信号盒sThis is the tool that is usually found in the older type of signal boxes. By pulling the relevant levers, the Signaller can operate signals, points, barriers etc.
" class="glossaryLink ">杠杆框架，但可以电动操作;这些是机械臂而不是彩色灯
