| 摘要 |
<p>The device (100) has a roller carrier (2) connected with an axis of rotation (A) of a first roller (1), where the carrier retains a second roller and a third roller (3b). The second roller and the third roller are in contact with the first roller and have different diameters for sequential deformation of grooved bars (11). The carrier is formed such that the second roller and the third roller are positioned before and behind the first roller respectively for uniformly distributing pressing force of the first roller on the second roller and the third roller.</p> |
