| 摘要 |
The device consists of a bowl (1) which presents a perimeter edge (2) in which are arranged a set of pointed lugs (3) and a series of securing holes (4). For its part, a hoop (5) presents a set of guide holes (6) coinciding with the pointed lugs (3), and a series of through holes (7) coinciding with the securing holes (4). Once the bowl (1) is secured to the ground, an impermeable fabric (8) is spread over it and is pressed down, so that the pointed lugs (3) traverse it and become visible. The hoop (5) is positioned by introducing the pointed lugs (3) into the guide holes (6) and locating the screws (9) which traverse the through holes (7) of the hoop (5) and become firmly tightened in the securing holes (4) of the perimeter edge (2), permitting the hoop (5) to clasp the impermeable fabric (8). Finally, part of the impermeable fabric (8) is detached along the cutting line (10) in order to allow the passage of water. |
