a narrow elongated spreader box having {HEAD ~ a generally rectangular cross section} with {TAIL ~ a sloped hopper bottom} 
with
a narrow elongated spreader box having { HEAD ~ a generally rectangular cross section } with { TAIL ~ a sloped hopper bottom }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL