The result is that multi-steps forming can improve the forming ability of sheet metal and retrain the wrinkling defect;

结果表明，多道次成形可以提高板材成形能力，抑制起皱等成形缺陷的产生；

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The result is that multi-steps forming can improve the forming ability of sheet metal and retrain the wrinkling defect;

结果表明，多道次成形可以提高板材成形能力，抑制起皱等成形缺陷的产生；

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