... 20T NCT punching, AMADA 100T CNC bending , rivet joint machines, flow-drilling machines, welding machines, and other auxiliary machines.Very strict quality control ... , punching, piercing, welding, spot welding, bending, forming, cutting, spot welding, shearing, deburring, painting, metal finishing, electromechanical assembly, metal fabrication, riveting and fastening. Welded sheetmetal ...