| 摘要 |
<p>It comprises at least one grid (2, 3) and one boom (4) with their respective directive elements (5) that are separated by a predetermined distance and characterised in that it comprises at least one grid (2, 3) securing element (6), to the boom (4), which comprises: a stem-shaped body (7) that clamps the boom (4), and a grid prolongation (8, 9), with an interior passage (17, 18) in the respective direction of each grid, attached to the stem-shaped body (7) so that, in the storage position, the at least one prolongation (8, 9) and the director elements (5) are in the same horizontal plane and, in the rotation position, the securing element (6) rotates with respect to the boom (4), causing the prolongation (8, 9) to rotate until it reaches the predetermined position.</p> |
