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大賣場門口的冷氣問題
Jun 14th 2013, 18:55

就是自動門打開,上面不是會吹很強的冷氣下來,是幹嘛用的啊?
朋友是說門打開後,防止蒼蠅跟蚊子飛進去
另一個朋友是說防止室內跟室外的溫差,打開後吹冷氣 防止外面熱空氣進來
所以到底門上面裝冷氣往下吹是要幹嘛的 ?!

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