| 摘要 |
The foot-rest has a platform (1) joined to the chair by two U-shaped tubes (3,9). An intermediate U-shaped tube (19) joins them and slides on them via rings (17,23) on the tubes. Screws (21) through the upper rings (17) lock the intermediate tube in place. A gas strut (11) is mounted between the intermediate tube and the tube (9) joined to the chair. It exerts a vertical force (F) at its strength is between the weight of the patient's legs and the weight of the patient and is preferably equal to 25 daN. |
