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Jyutping jin1 mou6 taam3 cak1 hei3
Pinyin yān wù tàn cè qì

Definitions (Wiktionary)
  1. noun
    smoke detector; smoke alarm
    (syn.) 烟雾报警器, 煙霧報警器
Examples (粵典–words.hk)
  1. Cantonese
    烟雾探测器
    煙霧探測器
    jin1 mou6 taam3 caak1 hei3
    • smoke detector