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　　This machine is suitable for belt conveyor roller, the outer ring of the tube welding seam, the CO2 or mixed gas for the protection of the medium match with 2 sets of CO2 gas shielded welding, the mechanical and hydraulic pressure for automatic transmission, crater arc automatic lap. Electric control adopts "PLC" for automatic control, simple operation, reliability, in addition, filling the rest on artificially all processes automatically.