supply of inverter based synergic pulse mig mag 400 s & 500 s , inverter based synergic pulse mig mag 400 amps welding machine [ warranty peri od: 36 months after the date of delivery ] ] , camc charges for 400 amps for camc for 5 years after expiry of warranty period of thre e years from the date of commissioning. [ warranty period: 3 years, amc period: 5 years, rate of discounting: 10 % ] ] , inverter based synergic pulse mig mag 500 amps welding sets [ warranty period: 36 months after the date of delivery ] ] , camc charges for 500 amps [ warranty period: 3 years, amc period: 5 years, rate o f discounting: 10 % ] ]