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