| 摘要 |
A sheet metal ventilation louver is fabricated out of two types of blades, a center and a top/bottom blade, that are shaped in a manner that permits their slidable engagement with an outer support frame. The side panels making up the outer frame are fabricated out of sheet metal rectangles that have been bent, with slots formed in the bent areas at locations enabling the slidable receipt of the blades within the side panel slots. An outer frame then fits around the side panels, retaining both the side panels and their received blades in position, completing the ventilation louver.
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