... , like: 220V, 60Hz, 3-phase) MCU for welding process, Model: AT89C52(ATMEL, USA)Welding power supplyDC 290 – 330VCompressed air≥ 0.4 ... digital display screenCoil spec. :- Angle- Nails per coil- Welding wires16°200 – 400 copper coated steel wire VF inverterModel: ... , like: 220V,60Hz, 3-phase) MCU for welding process, Model: AT89C52(ATMEL, USA)Welding power supplyDC 290 – 330VCompressed air≥ 0.4 ...