| 摘要 |
<p>A hazard warning or traffic control device 10 has a planar sign 16 or 18 and a cover 20 which itself either has a sign portion 32 which is adapted to receive a sign portion 32. There may be a cover 30 for the sign 32 and the cover 30 can be in sections 35, 36, 37 one or more of which can receive removable sign portions 38.</p> |
