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消委會指變頻式冷氣機較省電 一年電費最多相差約800元
即時港聞2023-04-16
消委會測試13款「匹半」窗口冷氣機 發現變頻式較省電
即時港聞2023-04-16
測試指變頻冷氣較定頻省電 電費可相差9成
即時港聞2016-05-15
No. 1 / 1 Page
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