Running Contract For Manufacture And Supply Of Pre-Stressed Mono Block Concrete Sle Epers (Pre-Tensioned Type) For Level Crossing With 60Kg Uic Running Rail And 52Kg Check Rail For B.G . (Alt. Upto Date) As Per Rdso Drg. No.T-4148 Alt-6 Irs Specification No.T-39 (Sixth Revision, March-2 021) Duly Loaded Into Wagons/ Road Vehicles. [ Warranty Period: 60 Months After The Date Of Delive Ry ] ]