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