| 摘要 |
<p>A sleeper having two pairs of protuberances upstanding from its upper portion, the protuberances of each pair defining between them a rail seat, apertures in the upper wall of the sleeper which extend from the protuberances for a short distance away from the rail seat, four U-shaped clips engaging each sleeper, each U-shaped clip having an upper toe, which bears downwardly on the upper portion of the rail, a heel engaging the upper surface of the sleeper adjacent the relevant aperture, and a lower toe extending through an aperture in the rail and bearing upwardly against the undersurface of a respective protuberance.</p> |
