| https://www.eptac.com/faqs/ask-helena-leo/ask/type-of-water-to-use-on-soldering-sponges
. After pre-cleaning, the water is supplied to the reverse osmosis membrane, and then the water is filtered through a special deionization medium, which removes the rest of the ions in the water
| http://www.thebranfordgroup.com/dnn3/Auctions/RecentAuctions.aspx
- Featuring 2016 GE Reverse Osmosis System, Demineralized Water Treatment Plant Eagan, MN Specialty Packaging Company [Online] SOLD - Auction Closed on 10/14/2021 Surplus Auxiliary Equipment from a Leading Medical Molder Late-model Portable Chillers
| http://www.thebranfordgroup.com/dnn3/Auctions/PastSales/tabid/58/Default.aspx
- Featuring 2016 GE Reverse Osmosis System, Demineralized Water Treatment Plant Eagan, MN Specialty Packaging Company [Online] SOLD - Auction Closed on 10/14/2021 Surplus Auxiliary Equipment from a Leading Medical Molder Late-model Portable Chillers
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