In other embodiments, the coil restraints of {HEAD ~ the present disclosure} are attached in each trough and extend transversely or across {TAIL ~ the trough} 
In other embodiments , the coil restraints of { HEAD ~ the present disclosure } are attached in each trough and extend transversely or across { TAIL ~ the trough }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL