In this embodiment, the bottom wall 154 is also wider than {HEAD ~ the top wall} 152 to facilitate {TAIL ~ attachment} of the coil restraints to the trough 
to facilitate
In this embodiment , the bottom wall 154 is also wider than { HEAD ~ the top wall } 152 to facilitate { TAIL ~ attachment } of the coil restraints to the trough
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH