There are several materials now in use possessing remarkable power to decolourize clarify, chemically purify and oxidize water; but they are too costly for use in connexion with public water supplies unless a rate of filtration is adopted quite inconsistent with the formation of a surface film capab
decolourize הגייה עם משמעויות, מילים נרדפות, הפכים, תרגומים, משפטים ועוד