| 摘要 |
<p>. A seat, in particular for a tractor, has a shoulder support mounted at the upper end of a backrest of the seat on a hinge device. The hinge device, when locked, holds the shoulder support in an upright position but, when released, allows the shoulder support to be tilted downwardly to a horizontal position to support an arm and shoulder of the seat occupant when ploughing or reversing the tractor.</p> |
