Preferably, the temperature of {TAIL ~ the air} supplied to the first zone is 40° to {HEAD ~ 80° C.} below the air supplied to the following zone or zones 
Preferably , the temperature of { TAIL ~ the air } supplied to the first zone is 40 ° to { HEAD ~ 80 ° C. } below the air supplied to the following zone or zones
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH