| 摘要 |
A shutter for a building aperture comprising a shutter curtain having a first and second face, the shutter curtain being locatable in the aperture. The shutter further comprises a filament spanning the aperture and lying in a plane substantially parallel and adjacent to the first face of the shutter curtain and a tensioning device for applying tension to the filament to provide support to the curtain against flexure thereof in a direction towards the filament.
|
