| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling method for using a grooved roll which is forced to be recut or scrapped heretofore. SOLUTION: At the time of executing rolling using a roll array in which one or plural sets of a pair of rolling rolls having the same groove are continuously arranged, before the rolls are recut or scrapped by the expiry of their life, a pair of these rolls are reused by inversely changing the upper and lower rolls or right and left sides.
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