... communities, units, streets, subway and schools. Coin and touch-free IC card sales modes, economic, convenient and sanitary.Applied American advanced RO anti ... , such as sand, alga, chlorine, heavy metal, organic composition and germ.2 4-hour non-stop ultraviolet sterilization, ensuring water ... if there is impurity in the water by eyes.Coin and intelligent IC card charging technology, both of which can ...