| 摘要 |
The sofa-bed has a mattress frame (1,2,3) in three parts which are articulated to each other. It is raised by an arm (22) that slides in a slide (21) joined to the front part (1) and is articulated on a base frame (6). A second arm (23) is articulated on the first arm and on a curved lever (24). This moves a guide rod (27) that slides in a slide (28) under the intermediate part (3).
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