IS:815-1966 Classification & costing of covered electrodes for metal pre welding of metal steel & laealthy
Indian Standard Institute
IS:815-1966 Classification & costing of covered electrodes for metal pre welding of metal steel & laealthy - ISI Manak bhawan 1966 - 28
IS:815-1966 Classification & costing of covered electrodes for metal pre welding of metal steel & laealthy - ISI Manak bhawan 1966 - 28