| 摘要 |
Assembly is disclosed for connecting a duct to a hole in a flat sheet including a wall for receiving one surface of the flat sheet, a nozzle adapted to be sealingly connected to a duct, the nozzle protruding through and beyond the wall such that the flat sheet is arranged with said one surface in engagement with the wall and the nozzle, and a sealing collar engaged with the other surface of the flat sheet, said collar being adapted to cooperate with the wall to seal the flat sheet therebetween. |
