摘要 |
The cap wall (5) fits inside the hole and sealing lips (6) extend around the peripheries of the wall and/or cap base (4). At least one gap (24) or channel is present in the cap wall to enable water collected on top of the base to drain away through a valve (12) integrated with the base. The valve has a flap (14) extending parallel to the plane (A-A) of the bodywork. The valve flap may be sealed on the base and have a groove (15) that is shorter than the length of the valve flap. |