supply of manufacturing and supply of at welding , manufacturing and supply of at welding portions (using compressed petrol/ lpg pre heat ing system) 3 piece prefabricated mould (zircon washed) manually pressed, single shot crucible fitte d with auto tamping thimble as per rdso specification no.irst/19-2021-52kg (90uts) grade rail-25m m gap. & all connected consumables as mentioned in annexure-i. note: mould sand and pf moulds 10% extra should be supply free of cost and mould shoes also will be supplied 3 pairs for every 100 portions. [ warranty period: 30 months after the date of delivery ] ] , manufacturing and supply of at welding portions (using compressed petrol/ lpg pre heat ing system) 3 piece prefabricated mould (zircon washed) manually pressed, single shot crucible fitte d with auto tamping thimble as per rdso specification no.irst/19-2021-52kg (90uts) grade rail-25m m gap. & all connected consumables as mentioned in annexure-i. note: mould sand and pf moulds 10% extra should be supply free of cost and mould shoes also will be supplied 3 pairs for every 100 portions. [ warranty period: 30 months after the date of delivery ] ] , manufacturing and supply of at welding portions (using compressed petrol/ lpg pre heat ing system) 3 piece prefabricated mould (zircon washed) manually pressed, single shot crucible fitte d with auto tamping thimble as per rdso specification no.irst/19-2021-52kg (90uts) grade rail-25m m gap. & all connected consumables as mentioned in annexure-i. note: mould sand and pf moulds 10% extra should be supply free of cost and mould shoes also will be supplied 3 pairs for every 100 portions. [ warranty period: 30 months after the date of delivery ] ]