... furniture frames:metal sofa frame,sofa mechanism,folding hinges 2.made of CNC Bending machine,Electronical Welding. Furniture Frame: 1. ... Surface treatment: powder coating or painting, Surface Oxidizing,metal polishing, dephosphorization,Silkscreen or by request3. ASTM ,AISI ... and manufacture a variety of enclosures with different materials, sizes, surface treatments, shapes and sheet metal processing ...