| 摘要 |
<p>The vertical shutter has a shutter panel (1) maintained by vertical beams (2) connected horizontally to a second similar shutter by props (3,4). The vertical beams are double beams that leave a transverse space between their two parts (7,8) that are applied to the shutter panel. The space extends beyond high and low braces (3,4). In the highest part of this space is an extension (10) articulating about a horizontal axis (11) parallel to the shutter plane and which can be immobilised in two principal positions, vertical and horizontal.</p> |
