| 摘要 |
Drive means comprise driving means, driven means (33), and intermediate means (75) located between the driving means and the driven means such that there is an angled line of drive between the driving means and the driven means, first flexible drive transmission means (76) extending between the driving means and the intermediate means (75), and second flexible drive transmission means (83) extending between the intermediate means (75) and the driven means (33), first tensioning means (105) operable to move the intermediate means (75) in a direction to tension the first flexible drive transmission means (76), and second tensioning means (97) operable to move the intermediate means (75) in a direction to tension the second flexible drive transmission means. |
