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