{TAIL ~ The free lengths} of {HEAD ~ the finished springs} may be controlled by applying axial forces during heat hardening 
{ TAIL ~ The free lengths } of { HEAD ~ the finished springs } may be controlled by applying axial forces during heat hardening
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH