Gem Bids For Annual Maintenance Services For Water Purification And Conditioning System Version 2 - Potable Water Purification System With Inbuilt Water Cooler.; Upto 3; Package-5 : Water Purifier And Conditioning System Maintenance Involving Basic Servicing F.. Annual Maintenance Services For Water Purification And Conditioning System Version 2 - Potable Water Purification System Reverse Osmosis Or Uv Based; Upto 3; Package-5 : Water Purifier And Conditioning System Maintenance Involving Basic Servicing ..