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