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