lia̍t-suànn熱線

hotline

hotline (telephone line that is able to give immediate assistance); hot route; infrared

physics

English Wiktionary, “熱線” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E7%86%B1%E7%B7%9A · confidence: Medium (Wiktionary, Hokkien)