Supply of Gfn-66 Insulating Liners As Per Rdso Drawing No. T-3706 As Amended Upto Date And Conforming To Irs Specification No. T-44-2020 As Amended Upto Date For Use With Erc Mk-Ii Flat Toe For 60 Kg. Rails On Concrete Sleepers. The Alt. In Drawing And Specification Issued By Rdso Up To One Month Prior To Tender Opening Date Shall Be Applicable.. :