Treatment of metal; metalworking, namely, forming of metal parts; metalworking, namely, hot forming of metal parts; metalworking, namely, cold forming of metal parts; welding of metal parts; rotary friction welding; linear friction welding; metal stamping, namely, drawing of metal parts; metal stamping, namely, drawing of sheet metal; metal stamping, namely, drawing of metal profiles; refining of metals; custom assembly of materials for others, namely, assembly of custom-made productions of m...