In addition, water from the pool is subjected to dust removal through the filter and then introduced into {HEAD ~ the sterilizing chamber} wherein {TAIL ~ the water} is sterilized and deodorized by the ozone bubbles 
wherein
In addition , water from the pool is subjected to dust removal through the filter and then introduced into { HEAD ~ the sterilizing chamber } wherein { TAIL ~ the water } is sterilized and deodorized by the ozone bubbles
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH