A reference numeral 9 denotes {TAIL ~ a maintenance bay route} for {HEAD ~ maintenance} of guided vehicles 10 
A reference numeral 9 denotes { TAIL ~ a maintenance bay route } for { HEAD ~ maintenance } of guided vehicles 10
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH