washer

washer
noun
  1. [usu. with modifier]a person or device that washes something
    洗涤者;洗涤器
    a glass washer.
    玻璃清洗器。
    ■a washing machine
    洗衣机
    ■a windscreen washer
    汽车挡风玻璃刮水器
    ■(Austral.)a facecloth
    (澳)洗脸毛巾
  2. a small flat ring made of metal, rubber, or plastic fixed under a nut or the head of a bolt to spread the pressure when tightened or between two joining surfaces as a spacer or seal
    垫圈
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