... ,sewage water ,dringking water and swimming pool water treatment and so on .2,CHYS-series Integrate ozone generator ... "CHYS" means water ozone machine,"2" means water treatment capacity, and it can be adjusted from 2 to ... "CHYS" means water ozone machine, "2"means water treatment capacity(just like above)."C" means it will be ... series ozone generator. 3,CE certification water treatment machine CHYS-D