What does ROII stand for?

ROII stands for "Reverse Osmosis, second stage"

How to abbreviate "Reverse Osmosis, second stage"?

"Reverse Osmosis, second stage" can be abbreviated as ROII

What is the meaning of ROII abbreviation?

The meaning of ROII abbreviation is "Reverse Osmosis, second stage"

What does ROII mean?

ROII as abbreviation means "Reverse Osmosis, second stage"