Sinking of 250mm x 150mm dia. 350 mtr. deep Tubewell (New) by Direct Rotary Rig Method using P.V.C pipe and pre-packed Resin Bonded Gravel Filter at Tube Well No. -4 of Chunakhali Water Supply Scheme (Zone-II), Block- Basanti.South 24 Parganas Dist.
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