{HEAD ~ The insert} 52 is thus compressed within the cavity 50 and against the rail seat area 18 of {TAIL ~ the tie} 12 
{ HEAD ~ The insert } 52 is thus compressed within the cavity 50 and against the rail seat area 18 of { TAIL ~ the tie } 12
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH