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