Tenders for Manufacture And Supply Of Prestressed Concrete Sleepers Sej Conforming To Rdso Drg. No. T-4 149, Alt-4 For Long Welded Rails. Specification: Irs Specification For Pretensioned Prestressed Concrete Sleeper S For Turnouts T-39-20216Th Revision March-2021. Warranty Period: 60 Months After The Date Of Delivery
