In other embodiments, {HEAD ~ the coil restraints} are attached in {TAIL ~ each trough} along the length of the trough 
are attached in
In other embodiments , { HEAD ~ the coil restraints } are attached in { TAIL ~ each trough } along the length of the trough
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH