FIG 15 is {TAIL ~ a perspective view} of a series of {HEAD ~ spring elements} in a stacked arrangement 
FIG 15 is { TAIL ~ a perspective view } of a series of { HEAD ~ spring elements } in a stacked arrangement
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH