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