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Bars, structural shapes, and long parts are straightened by bending, twisting, or stretching. This article describes the straightening of bars, shapes, and long parts by material displacement, heating, and presses. It explains the process of parallel-roll straightening, automatic press roll straightening, moving-insert straightening, parallel-rail straightening, and epicyclic straightening. The article concludes with a discussion on straightening in bar production.

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