The properties of the gears can be improved still further if the greatest dimension of the spheroidal graphite particles in {HEAD ~ the cast iron} is at most {TAIL ~ 0.06 mm} 
The properties of the gears can be improved still further if the greatest dimension of the spheroidal graphite particles in { HEAD ~ the cast iron } is at most { TAIL ~ 0.06 mm }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL