{TAIL ~ an electric power supply unit} configured to stop supplying {HEAD ~ electric power} to at least the cooling unit when or after the cooling unit completes the cooling process; and 
{ TAIL ~ an electric power supply unit } configured to stop supplying { HEAD ~ electric power } to at least the cooling unit when or after the cooling unit completes the cooling process ; and
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH