supply of goods, manufacture and supply of portions for fusion welding of 60kg/60e1 (r260 grade) rail and 60 kg (90uts) rail with 25mm gap by alumino thermit process using compressed air petrol system/oxy lpg/ oxy propane pre-heating with 3 piece prefabricated mould (zircon washedgoods, manufacture and supply of portions for fusion welding of 60kg/60e1 (r260 grade) rail and 60 kg (90uts) rail with 25mm gap by alumino thermit process using compressed air petrol system/oxy lpg/ oxy propane pre-heating with 3 piece prefabricated mould (zircon washed,goods, manufacture and supply of portions for fusion welding of 60kg/60e1 (r260 grade) r ail and 60 kg (90uts) rail with 25mm gap by alumino thermit process using compressed air petrol syste m/oxy lpg/ oxy propane pre-heating with 3 piece prefabricated mould (zircon washed) manually pres sed/core shooted with auto tapping thimble and single shot crucible with latest alterations. ? applicable rdso specification is irs t-19-2021 rev.7.0, ? applicable str (schedule of technical requirement) is td g0017, ver 4.0, ? list of required consumables as per annexure - a. (the alteration in drawing, schedule of technical requirement (str) and specifications issued [ warranty period: 30 months after the date of delivery ] ]