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