Question: What goes through the Channel Tunnel that links Folkestone in the UK with Coquelles, near Calais in northern France?
Answer: continuously welded rail
railway track
track maintenance equipment
permanent way
track maintenance
maintenance of way
maintenance of way equipment
jointed track
railroad track
track machines
train tracks
jointed rail
railway lines
track repair
track rail
continuous welded rail
wheeltimber
rail welding
ribbon rail
train track
track railway transport
track machine
track rail transport
permanent way current
ribbon rails
rail classification
rail tracks
track banking
railroad tracks
welded rail
trackage
train speed limit
rail class
railway tracks
rail speed limit
waybeam
commercial track
railway maintenance
rail track