Goods, Manufacture and Supply of Prestressed Mono- Block Concrete Line Sleepers ( RT- 8746 ) ( Pre- tensioned type ) for Broad Gauge ( 1673 mm ) conforming to RDSO Drg No. T- 8746 and IRS Specification no. T- 39 from Kolkata, WB — VEE KAY PRESTRESSED PRIVATE LIMITED | BharatSeal