Manufacture And Supply Of Wider Bridge Deck Prestressed Concrete Sleepers For B.G. 60 Kg (Uic)/60 E1/52kg Running Rail To Rdso Drg. No. T 8970, Alt 1, As Per Irs Specification Sl. No. T 39 2021 (6th Revision March 21), Corrigendum 1, (Latest Alteration To Rdso Drawing And Latest Revision/Amendment To Irs Specification As Applicable 10 Days Before The Date Of Closing Of E Tender Will Be Applicable.)