In {TAIL ~ further embodiments}, {HEAD ~ a restrainer} can be provided to limit and control the movement of the spring arms 
In
In { TAIL ~ further embodiments } , { HEAD ~ a restrainer } can be provided to limit and control the movement of the spring arms
REL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH