| 摘要 |
The invention is formed by at least one tight chamber (6), with an inner layer (3) and an outer layer (4), that can be arranged around an obstacle (2) such as an informative post on a ski slope. The invention also comprises an set of joining elements (12) between the inner layer (3) and the outer layer (4), that keep the distance between the two layers (3, 4) constant. |
