... continuous introduction of the latest technology in automatic control system.Under regular vibrations, the disordered wire nails/roofing nails ... like: 220V, 60Hz, 3-phase) MCU for welding process, Model: AT89C52(ATMEL, USA)Welding power supplyDC 290 – 330VCompressed air≥ ... , like: 220V,60Hz, 3-phase) MCU for welding process, Model: AT89C52(ATMEL, USA)Welding power supplyDC 290 – 330VCompressed air≥ ...