Sinking of 250mm x 150mm dia. 360 mtr. deep (Replacement) Tubewell by Direct Rotary Rig Method using P.V.C pipe and pre-packed Resin Bonded Gravel Filter of Augmentation of Pathankhali (Zone-I) W/S Scheme, Block - Gosaba (Tubewell No.-4) (2nd Call)
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