| 摘要 |
<p>The bollard for a car park comprises a lower part buried in the ground and a movable part, each of which contains corresponding sets of holes allowing the upper part to be locked in position at different heights or removed altogether. The upper part has two metallic tubes, which are welded together in the form of a T. The lower part consists of a metallic tube, four-fifths of which is buried.</p> |
