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    Vertical bi-folding doors are made of steel frames with matching outer cladding. This door, which can be power operated and remote controlled, has automatically open/close/lock mechanism. When open the door, the top and the bottom leaves fold outward through lifting mechanism. Such opening mode is suitable for the opening of large span, and particularly for the buildings which have no space at the top and both sides of doors. Vertical bi-folding doors only occupy the upper space, but no ground space at all. This is the priority solution for helicopter hangars, large garages. Meanwhile, it’s also fitted to the buildings with curtain wall structures. Its main features are elegant appearance, easy to match architectural styles, safety running and lower noise.



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