water seal

 
       
  • n. 水封(止水)

water seal的用法和樣例:

例句

用作名詞 (n.)
  1. Air and water are needful for living things.
    空氣和水是生物不可缺少的東西。
  2. The test tube is closed at one end with a hydraulic seal.
    試管的一端為水封所封閉。
今日熱詞
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