| 摘要 |
<p>Detailed are adjustable seating assemblies. Seat height adjustments may be made manually, without need for tools or pneumatic and hydraulic mechanisms. In some versions, cut-outs with complex shapes may receive pins to lock a seat into position. Unlocking, however, may occur through simple lifting and rotation of the seat. In other versions, bolts, pins, or other fasteners may be inserted into or through aligned openings associated with a seat base and its corresponding frame.</p> |
