| 摘要 |
A duct comprising a botten (1), two side walls (2) and a lid (6) which can be mounted and removed, at which the angle ( alpha ) between the respective side wall (2) and the bottom (1) is greater than 90 DEG C in the open position of the duct. Each of the side walls (2) is provided with at least one longitudinal, inwardly projecting section (4) and the lid (6) has from the plane of the lid (6) substantially perpendicularly projecting, longitudinal lateral sections (8) provided with at least one inwards directed bead (9) at the inner side of the respective lateral section (8), the lid being attachable to the side walls (2) of the duct by those being forced inside the lateral sections (8) of the lid (6). The beads (9) of the lateral sections (8) co-operate with the inwards directed sections (4) of the side walls, whereby a tight duct is created. <IMAGE> |
