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