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Jyutping jik6 aat3
Pinyin yì yā

Definitions (Wiktionary)
  1. noun
    hydraulic system; hydraulic machinery

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Jyutping jik6 aat3
Pinyin yè yā

Definitions (CC-CEDICT)
  1. hydraulic pressure
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)