| 摘要 |
<p>The extractor has a mobile chassis or dome (14), transparent or translucent, of circular or hexagonal shape, that rests on a base (12) which has the same shape. The dome is mounted on a central vertical shaft (16) which displaces the dome vertically while centering it with respect to the base. The displacement is via a spring, or gas operated jacks (18,18'), which are horizontal and totally compressed when the dome is closed, with a spring inside the shaft starting a vertical motion continued by the jacks.</p> |
