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