Manufacture and Supply of Mono Block Pre- Stressed Concrete Line Sleeper ( pre- tensioned type ) confirming to Drawing No. RDSO/ T- 8746 ( Alt. No. 1 ) and Specification No. IRS: T- 39 ( 6th Revision March 2021 wit from Kolkata, WB — VEE KAY PRESTRESSED PRIVATE LIMITED | BharatSeal