| 摘要 |
A vented wall, e.g. for animal sheds, has a number of horizontal slats on pivot mountings. In the fully closed position the slats have an staggered overlapping pattern. The fully open position has the slats horizontal. The slats have minimum thickness for maximum venting and are pre-assembled in a support frame for ease of fitting, and are made of wood, glass, metal, plastic or any other suitable material. They can be linked by control bars, tapes or chains for ganged control.
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