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Ventilator grille cover with pivot hinges and snap-locks has circular grille with concentric rings linked by identical curved radial crosspieces
Ventilator grille cover with pivot hinges and snap-locks has circular grille with concentric rings linked by identical curved radial crosspieces
A ventilator fan has a cover with an essentially circular aperture. The aperture is protected by a grille that consists of a series of equidistantly spaced concentric rings, linked by radial crosspieces. The cross pieces have an arc planform.
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