| 摘要 |
A fitting (1) is provided in the form of one or more sheets resting on the surface of the roof which has a hole (5) for the duct and a collar (3) projecting upwards at angle from the sheet, with tubular mantle (2) applied around the duct with a sharply cut lower end. A joining part (4) is positioned between the hole and collar, whose lower section overlaps with at least part of the outer surface of the collar, whilst at the same time the lower section of the mantle surrounds and at least partly overlaps the outer surface of the joining part. The joining part has a U-shaped or tubular cross section that mates with the upper end of the collar, enabling the part to be rotated about an axis (6) parallel to the plane of the cover and perpendicular to the roof incline. |
