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Primary Metals

      Primary Industry
    AFFCO Inc. Anaconda
Ferrous Metal Foundries
    American Chemet Corporation East Helena
Secondary Smelting, Refining, and Alloying of Copper
    Montana Hammer and Forge Eureka
Iron and Steel Forging
    Montana Precision Products Butte
Ferrous Metal Foundries
    Northwest Parts & Rigging Co I Kalispell
Alumina and Aluminum Production and Processing
    Stillwater Mining Co. Nye
Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum)
    Timberline Tool & Casting Whitefish
Aluminum Die-Casting Foundries