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