| 摘要 |
<p>The grid ceiling has cross arm stems running one or both ways, and is esp. in the form of a light screen, with fixture elements for attachment to traverses or similar retainer stems. These fixture elements (4) are movable relative to the light screen, and can be moved in and out o on the traverse (5). They can be hook-shaped and fastened so as to swivel near the light screen's ends, with the hook area swinging out to the traverse round a bearing in the hook shaft. They may have a grid aid on one side, pref. in the form of an outward bent fishplate (23) partially punched out and can be made of sheet metal, in one piece.</p> |
