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