| 摘要 |
An assembly including a cover (2) and a frame (1) including a plurality of generally straight sides in plan configuration, in which the cover is adapted to be mounted within the frame by means of complementary and mating support surfaces (19, 20, 21, 22) of a non-wedging configuration and angled at or adjacent or about a first side (in plan view) of the assembly, and by means of complementary and mating pairs (7, 8, 9, 10) of wedging support surfaces of the cover and frame at or adjacent or about a second side of the assembly opposing the first side, the wedging surfaces being downwardly inclined in a direction across the second side and inwardly towards the first side. |
