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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
OEM Press Systems is a Fullerton, CA-based company in the Manufacturing sector.
Miller Tool and Die Co is a Jackson, MI-based company in the Manufacturing sector.
Penn Machine Co is a Johnstown, PA-based company in the Manufacturing sector.
Aerodyne Precision Machining is a Huntington Beach, CA-based company in the Manufacturing sector.