In {HEAD ~ the sterilizing chamber}, {TAIL ~ contact} of the filtered water and air ozone mixture acts to simultaneously purify both 
In { HEAD ~ the sterilizing chamber } , { TAIL ~ contact } of the filtered water and air ozone mixture acts to simultaneously purify both
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH