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It is found that the floor surface temperature variety exponentially with time after the change of water condition, and the heat lag in the heating period is about half of that in cooling period. 發(fā)現(xiàn)供水狀態(tài)變化后，地板表面溫度隨時(shí)間呈指數(shù)變化，升溫期的穩(wěn)定時(shí)間約為降溫期的一半。