Methods for measuring {HEAD ~ the resiliency} of {TAIL ~ golf balls} are well known by those of ordinary skill in the art 
of
Methods for measuring { HEAD ~ the resiliency } of { TAIL ~ golf balls } are well known by those of ordinary skill in the art
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH