| 摘要 |
The industrial door air curtain is hollow and covers the upper part of the doorway. In its lower part the curtain has gaps or mouthpieces through which air is expelled downwards. Since the lower part of the doorway is open, there is unrestricted vision through it. With the upper part of the doorway covered, only a small amount of the amount of air and energy is consumed if it is required to blow air along the whole doorway. |
