{TAIL ~ The plates} forming contact surfaces 2 are intermediately supported by {HEAD ~ the intermediate weir} 13 within slots formed in the intermediate weir 
{ TAIL ~ The plates } forming contact surfaces 2 are intermediately supported by { HEAD ~ the intermediate weir } 13 within slots formed in the intermediate weir
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH