The springs 20 provide compliancy and overcome difficulties associated with {HEAD ~ varying coefficients} of {TAIL ~ thermal expansion}  
of
The springs 20 provide compliancy and overcome difficulties associated with { HEAD ~ varying coefficients } of { TAIL ~ thermal expansion }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH