{HEAD ~ A plurality} of {TAIL ~ cylinders} received in said well supporting a frame structure comprised of a plurality of channel member positions to be received in said canals 
of
{ HEAD ~ A plurality } of { TAIL ~ cylinders } received in said well supporting a frame structure comprised of a plurality of channel member positions to be received in said canals
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH