| 摘要 |
<p>A tamping shoe (1) for a vibration rammer: has a plurality of through holes (7, 11) communication between an under surface and an upper surface. The through holes (7, 11) permit the escape of air trapped between the under surface and a surface being tamped, and thereby reduce the amount and pressure of air compressed under the tamping shoe. This reduces noise pollution produced during tamping. In a preferred embodiment, the through holes are tapered outward in the direction of air flow. Air passing through a through hole (11) into a mount (2) is released through a further through hole (12) bored through a wall of the mount (2). <IMAGE></p> |
