| 摘要 |
The plate (8) has length and width measurements which so match the frame (3), and the frame has plate accommodation components running along two opposite sides that the plate is bendable and can be applied in the frame without dismantling. The plate after bending to an outwardly bowed shape around an axis running through its central part is placed in position in the frame. The accommodation components for the plate in the frame comprise tracks running in two opposing frame profile parts (4), in which two opposite parallel edges of the plate fit, with the plate returning from its outwardly bowed shape to a flat form. The plate has a rectangular shape with horizontal side edges of greater length than the vertical side edges. The plate longitudinal dimension corresponds to or is less than the distance between the vertical frame profile parts (5). |
