Tenders for Supply of Compressed Air Petrol Pre Heating System With Complete Equipment As Per Rdso Specification Suitable For Welding Of Rail Joints By At Welding Process As Approved By Rdso Technical Specification No.Mxcmtd/Compressed Air Petrol Pre -Heating Machine 03/2008. Brand/Firms : Tttcap Or Equivalent. Accepted Firm Offer Make : Tttcap .Firm Itself Is Manufacturer.