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