... mild steel, stainless steel, chrome steel, cold rolled sheet, bearing steel, brass, copper, bronze, chrome copper, mold steel , ... bike , computer, optical fiber products , medical equipment, mobile phone, Camera ,gas stove, gas heater, furniture etcCertificate ... or samples. Processing MethodTurning, Stamping, Die/pressure casting, CNC processsing, Punching, Riveting, Bending, Cutting, Welding, Threading ...