Tender for Drilling Of 275 Mtr (07 Nos.) Boreholes Including Supply And Lowering Of 200 Mm Dia. (ms Erw Black Pipes Is 3589 With Tc, 6.5 Mm Thick) For Stabilization Of Underground Workings Near Unstable Area Zone-a, Zone-d And Zone-f Of Handidhua Colliery. in Talcher - Odisha

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