| 摘要 |
The vent (1) has the form of a ring which extends through an aperture in the panel periphery. The ring is of resilient material, provided with a flange. This flange is located outside the roof panel (15) and on top of its surface lining. Along the ring aperture edges on the flange is a projection extending outwards from the flange side away from the roof panel, to conduct away water running on top of the flange. On the other side of the flange are several projections which locate inside the hole (14) in the roof panel, centering the arrangement (1) in it, with the flange extending outwards over the edge of the hole. The aperture size, the dia. of the flange and the height of the projection are such that the clamped-together ring can be inserted through the hole from the inside of the roof panel to its outside. |
