| 摘要 |
<p>Emergency traffic signs for use on portable self-supporting panel type stands comprise loose covers of thermoplastic film fitted with laces, press buttons or turnbuckles to secure them over the stand. Appropriate reflective signs are stuck on to the surface of the cover. Pref. the covers are of flexible PVC pigmented or coloured to block penetration by UV radiation. Reflective signs or pietograms may be stuck or welded to the surface of the base cover.</p> |
