... grinding all kinds of special equipment.2, laser welding machines, vertical circular seam welding machines, horizontal circular seam welding machine, argon ... welding machine, gas shielded welding machine, spot welder, welding machines directly.3, 5 tons, 16 tons, 40 tons, 100 ... tons, 100 tons of hydraulic punching machines and other equipment.4, multiple medium-sized lathes, 4H- ...