Question:
What is the meaning of RO in water purification machine ?

Answer: Reverse Osmosis

for more information, please visit http://en.wikipedia.org/wiki/reverse_osm...Reverse osmosis, a process where water is purified by forcing it through a fine semipermeable membrane under pressure.Reverse Osmosis. The water is pushed through a membrane that is like a tube. The Purified water is collected from inside the tube. The pressurised water is outside, in the reservoir in which the tube is in.RO stands for Reverse Osmosis and is used to remove salts and virus etc. from water.