This compression aids in preventing the frame 40 from sliding on {TAIL ~ the tie} 12, and further seals the rail seat area 18 beneath the tie pad from {HEAD ~ any incursion} of moisture 
This compression aids in preventing the frame 40 from sliding on { TAIL ~ the tie } 12 , and further seals the rail seat area 18 beneath the tie pad from { HEAD ~ any incursion } of moisture
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 OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH