Contract For Mechanical Works Of Erection And Pre-Commissioning / Start-Up, Commissioning Assistance And Performance Guarantee Test, Closure Activities Of Fired Heater Packages And Interconnection Systems, Handing Over Of The Facilities Along With Spares For Dcu Heater At Iocl Digboi Refinery And Revamping Of Existing Ind-Coker Primary Furnace (07-Ff-00-001) Against S.O 8118