| 摘要 |
<p>The invention refers to a device for pulling and tensioning a trolley cable along the arm of a tower crane, characterised by the fact that it comprises a cable which is fixed to one end at the tip of the arm, reaches a first snub pulley supported by the trolley and departs from this to reach a second snub pulley supported by the trolley, having first passed in contact with a snub pulley supported by the arm and with means of movement, and ends with the other end connected to means of tensioning. <IMAGE></p> |
