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 明明沒抽菸廁所卻老是有菸味、早期的舊式大樓，通常採取共通管道間統一排氣的方式，屋頂風壓過大，直達屋頂的廢氣無法排出first: | 1 |
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| 明明沒抽菸廁所卻老是有菸味、早期的舊式大樓，通常採取共通管道間統一排氣的方式，屋頂風壓過大，直達屋頂的廢氣無法排出first: | 1 |
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