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Lone Star Technologies, Inc. is a management and holding company with six principal subsidiaries, Lone Star Steel Company (Steel), Fintube Technologies, Inc. (Fintube), Bellville Tube Company, L.P. (Bellville), Wheeling Machine Products, Inc. and
Sieb Sales is a Highland, IN-based company in the Manufacturing sector.
Harmsco Inc is a North Palm Beach, FL-based company in the Manufacturing sector.
Modern Machinery of Beaverton, Inc. is a Beaverton, MI-based company in the Manufacturing sector.
Thermal Engineering - unit of Babcock Power is a Los Angeles, CA-based company in the Manufacturing sector.