| 摘要 |
<p>The beam (1) has lateral branches (20) placed at ends of a central part (10). Each branch is formed in a hollow body (25) comprising front and rear parts (30, 40), where the part (40) comprises an inner sleeve having an end that is arranged in a calibrated orifice with a shape that is conjugated to the end. The orifice is provided in a connection part. The inner sleeve has longitudinal ribs that are placed between an inner surface of a wall of the sleeve and a cylinder that is concentric to the sleeve, where each rib has a S-shaped section.</p> |
