{TAIL ~ The spiral flow} increases the rate of convection and thus increases the cooling capacity of {HEAD ~ the cooling system} 
{ TAIL ~ The spiral flow } increases the rate of convection and thus increases the cooling capacity of { HEAD ~ the cooling system }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD