Therefore, {HEAD ~ the air} can be sterilized and deodorized by {TAIL ~ the water and ozone bubbles} 
sterilized by
Therefore , { HEAD ~ the air } can be sterilized and deodorized by { TAIL ~ the water and ozone bubbles }
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL