倒牙 [－－]

Jyutping dou2 ngaa2
Pinyin dǎo yá

Definitions (粵典–words.hk)
  1. 名詞
    左旋​螺紋
    left-handed threads

倒牙 [－－]

Jyutping dou2 ngaa4
Pinyin dǎo yá

Definitions (CC-CANTO)
  1. sensitive tooth