A rotor includes a high temperature section and {TAIL ~ a low temperature section} on {HEAD ~ its circumference} 
A rotor includes a high temperature section and { TAIL ~ a low temperature section } on { HEAD ~ its circumference }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD