| 摘要 |
<p>The invention relates to driving means for displacing two elongate members, the driving means comprising:
- a first set of at least a row of primary rollers (6) and a row of secondary rollers (7);
- a second set of at least a row of primary rollers (9) and a row of secondary rollers (8);
wherein the first set is connected to a first member and the second set is connected to a second member; and
wherein a belt (10) serpentines between the primary rollers (6) of the first set and the primary rollers (9) of the second set along the length of the members and serpentines back between the secondary rollers (7) of the first set and the secondary rollers (8) of the second set.</p> |
