The apparatus includes {HEAD ~ a hollow structural member} adapted to replace {TAIL ~ a conventional railway tie} and adapted to be connected to a source of heated air, and a mechanism for discharging the heated air from the hollow member to desired locations along the assembly 
adapted to replace
The apparatus includes { HEAD ~ a hollow structural member } adapted to replace { TAIL ~ a conventional railway tie } and adapted to be connected to a source of heated air , and a mechanism for discharging the heated air from the hollow member to desired locations along the assembly
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH