{HEAD ~ Tighter control} of {TAIL ~ the preload} therefore results in longer service life with a higher level of operating precision 
of
{ HEAD ~ Tighter control } of { TAIL ~ the preload } therefore results in longer service life with a higher level of operating precision
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH