In a disclosed embodiment, {TAIL ~ the temperature} in the region of the mandrel is measured, and the moving of the receptor fins is in accordance with {HEAD ~ the measured temperature} 
In a disclosed embodiment , { TAIL ~ the temperature } in the region of the mandrel is measured , and the moving of the receptor fins is in accordance with { HEAD ~ the measured temperature }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL 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