Compressed Air Petro Pre Heating System With Complete Equipment As Suitable For Welding Of Rail By At W Elding Process. Incorporation Of Data Transmitter Technology Fitted Sin Compressed Air Blower In Existing Contracts Of At Welding: 1) Ir Std Specification For Fusion Welding Of Rails By Alumino Thermit Welding S.No.Irst-19 2021. 2) Lr.No.W.5 03/Cte/Gennl.Corsp/2024 Dt11.01.2024. ]