| 摘要 |
<p>The weight (1) has an adjusting unit formed by transversal axles (2, 3), fixation plates (4, 5) and adjusting axles. The adjusting unit adjusts the vertical position of the transversal axles for modifying the ground clearance of the ballast weight, when the ballast weight is hooked to a lifting system. A fixation screw fixes the fixation plates to a body of the ballast weight in different positions differentiated by rotation of the plates around the adjusting axles. An independent claim is also included for a secondary ballast weight comprising projections.</p> |
