Sinking Of 200Mm X 150Mm Dia. 300 Mtr. Deep Tubewell By Direct Rotary Rig Method Using P.V.C Pipe And Pre-Packed Resin Bonded Gravel Filter At Chemaguri Point In Connection With G.S. Mela 2026 Under Canning Sub-Division Of Alipore Division, Phe Dte. Niet-35/Ad/25-26/12