closed arc

 
       
  • 閉弧

closed arc的用法和樣例:

例句

  1. There are no arc chutes and no arc by-products.
    沒有弧滑道和沒有弧副產物。
  2. A common laboratory source of light is provided by a mercury arc.
    通常的實驗室光源選用汞弧燈。
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