In this embodiment, the bottom wall 154 is longer than {HEAD ~ the top wall} to facilitate {TAIL ~ attachment} of the coil restraints to the trough as indicated above 
In this embodiment , the bottom wall 154 is longer than { HEAD ~ the top wall } to facilitate { TAIL ~ attachment } of the coil restraints to the trough as indicated above
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH