Manufacturing and Supply of Alumino thermic welding portions of 52Kg/ 60 Kg/ 60EI- R260 as approved by RDSO for welding of rails 52Kg/ 60Kg/ 60EI- R260 kg for 25mm gap by the process of AT welding along with complete accessories confirming to the specification laid down in Indian Railway Standard specification No. IRST- 19- 2020 up to date correction slips with Single shot crucible fitted with Automatic Tapping Thimble, 3 pieces pre fabricated mould ( Zircon washed ) manually pressed using compressed air petrol/ LPG pre heating for execution of welding of rail joint and all other connected ancillary works as per requirement in between of Katihar- Mukuria section from Ch: Km 0. 00 to Km 35. 86 and Katihar- Kumedpur section from Ch: Km 1. 388 to Km 30. 30 in connection with Katihar- Mukuria- Kumedpur double line project of N. F. Railway ( Construction ).