Léng-khiok (冷卻; cooling) sī bu̍t-chi̍t lāi-pō͘ ê jiat-lêng thong-kòe jia̍t-thoân-tō, jia̍t-tùi-liû ia̍h-sī jia̍t-hok-siā lâi thoân-jia̍t hō͘ khoân-kéng kài-chit ê kòe-têng.

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