Home » Tender for Govt. Collage Derabassi Tw </br> Providing And Installing One No. New Tubewell Of Size 200 Mm I/d Straight Upto 230 Mtr Depth With Reverse Rotary Rig In Place Of Failed Tubewell For Govt. Collage Derabassi At Existing Water Works Site Block Derabassi, Dis, India