| 摘要 |
<p>The device has a rigid nautical ladder provided with discontinuous lateral uprights and a beveled shaped rectilinear or curved median central upright (7). Kinematics of a ladder support (4) allows translation of the ladder floated with immersed bars. The ladder includes bars, echelons and horizontal steps that are connected using the discontinuous side uprights. The central upright defines a lateral closed frame on the ladder.</p> |
