| 摘要 |
One of a pair of chilled rolls is a mid-thick roll 100a which has a longitudinal central diameter greater than longitudinal end diameters. The other of the chilled rolls is a mid-thin roll 200a which has a longitudinal central diameter shorter than longitudinal end diameters. A roll gap 3 is formed between the mid-thick and mid-thin rolls 100a and 200a such that the rolls are gradually made closer to each other from longitudinal roll centers to longitudinal roll ends. |
