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