Turning to the drawings, FIG 1 illustrates {HEAD ~ a switch heating assembly} 2 for {TAIL ~ use} in heating rails 10 mounted on ties 12 
for
Turning to the drawings , FIG 1 illustrates { HEAD ~ a switch heating assembly } 2 for { TAIL ~ use } in heating rails 10 mounted on ties 12
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH