| 摘要 |
<p>The vehicle-mounted accessory aids entry and exit. It comprises a frame (1) fixed to the vehicle and on which two parallel arms, spaced apart, hinge (9). The arms also hinge on a step board (11) under the action of a pressure-operated ram (12), to move the board between a position close to the frame and one at a distance from it. The ram cylinder can hinge on the frame and its piston rod on one of the arms and can have a built-in electric pump.</p> |
