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Blogtrottr

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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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