Biennial Mechanical Maintenance Contract For Cooling Tower Stg I 2 X 300Mw Stgii 2 X 500 Mw Stiii 1 X 660 Mw Units At Sgtpp For 2 Years. Biennial Mechanical Maintenance Contractfor Cooling Tower Stg I 2 X 300Mw Stgii 2 X 500 Mw Stiii 1 X 660 Mw Units At Sgtpp For 2 Years.