Iron Ore Mining, Silver Ore Mining, Industrial Building Construction, Commercial and Institutional Building Construction, Power and Communication Line and Related Structures Construction

Secondary Smelting, Refining, and Alloying of Copper, Nonferrous Metal (except Copper and Aluminum) Rolling, Drawing, and Extruding, Machine Tool (Metal Cutting Types) Manufacturing, Machine Tool (Metal Forming Types) Manufacturing, Special Die and Tool, Die Set, Jig, and Fixture Manufacturing