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Jyutping cau3 taam3 hyun2
Pinyin xiù tàn quǎn

Definitions (Wiktionary)
  1. noun
    sniffer dog; detection dog
    (syn.) 緝毒犬, 缉毒犬

嗅探犬 [---]

Jyutping
Pinyin xiù tàn quǎn

Definitions (CC-CEDICT)
  1. sniffer dog