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Jyutping sit3 ting3 hei3
Pinyin qiè tīng qì

Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)

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Jyutping sit3 ting1 hei3
Pinyin qiè tīng qì

Definitions (CC-CEDICT)
  1. tapping device
  2. bug
Definitions (Wiktionary)
  1. noun
    bug, hidden microphone (an electronic listening device)