| 摘要 |
<p>Device for altering the slope of a telescopic stand (1) by raising each of tiers (2). The device sets in motion a raising system (3, 4, 5) and an associated initial angular lifting device (12, 13, 14). The devices according to the invention are especially intended for use in multiple purpose recreation halls and seek to afford spectators unobstructed views.</p> |
