40 Precision machine shop services in the nature of machining parts for others and custom metal fabricating and finishing with various grades of stainless steel, carbon steel, aluminum and exotic metals and plastics; Machine shop services, namely, machining parts for others; Metal, steel, and aluminum fabrication and finishing services for others; Custom fabrication of industrial machinery and equipment; Custom fabrication of pumps, gearboxes, mining machines, mining apparatus, and valves; Custom fabrication of chutes, discharges, hoppers, ducts, heat exchangers, industrial dryers, trommels, industrial piping, structural equipment, and bins; Grinding; Metallizing; Welding