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Jyutping baak3 hap6 si4
Pinyin bǎi hé shi

Definitions (粵典–words.hk)
  1. 名詞
    表面​光滑​冇​匙​齒​,​插落鎖​能夠​直達鎖​芯​嘅​鎖​匙​,​係​一種​常見​開鎖​工具​(​量​詞​:​條​)
    skeleton key, a type of master keys

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Jyutping baak3 hap6 si4
Pinyin bǎi hé chí

Definitions (CC-CANTO)
  1. Master Key