Therefore, {HEAD ~ the heat consumption} of the present invention is lower than {TAIL ~ the conventional device} which heats the whole bottle or bag of perfume 
is lower than
Therefore , { HEAD ~ the heat consumption } of the present invention is lower than { TAIL ~ the conventional device } which heats the whole bottle or bag of perfume
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH