| 摘要 |
The frame (A) is mounted on a first plate (1) hinged to a second plate (2) which in turn is provided with rolling means (7, 8, 9). The rolling means are distributed in two planes one above the other and also close to the rear wall of the frame. They run on the tracks (10, 11) mounted on the corresponding wall of a compartment. Of these latter, the lower track is positioned at about the height of the lower base (S) of the frame. Moreover the distance (D) between the hinge axis between said first and second plates (1, 2) and the wheels (7, 8) nearest the axis is minimal. In this way the frame runs very smoothly even when heavily loaded and it can also be withdrawn from the compartment almost completely. <IMAGE>
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