| 摘要 |
A rolling chassis supports dual lifting beams pivotably mounted on adjustable supporting pins. The beams are pivoted by rollers raised by dual driving piers. Each beam carried a pair of blocks for a rope running from a locking system on the chassis to one side of an upper harness, and another pair of blocks for a rope running from a locking system on the chassis to one side of a lower harness. A retractable knee pad assists lifting a patient from sitting to standing position as the beams pivot and retract the cables.
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