... per drawings or samples 4.100% inspection Item NO. welded steel ringsMaterialsIron, aluminum, steel, copper, plastic, carbon ... s drawingSurface treatmentHeat treatment, polishing, PVD/CVD coating, galvanized, electroplating, spraying, and painting and so on.PackingWooden ... lathe machine, milling machine, drilling machine, EDM, wire-cutting machine, CNC bending machine etc.Service projectTo provide ...