| 摘要 |
<p>Two flanged cylinders, one of which slides inside the other, are kept selectively in firm contact with each other by the engagement of elastic elements and their terminal booths with grips. The elastic elements and grips are fixed, respectively, on the outer perimeter of the inner cylinder and the outer perimeter of the outer cylinder. Engagement is maintained until the traction force applied to the two cylinders exceeds a predetermined value.</p> |
