高こう速そく度ど鋼こう

noun

high-speed steel

Technical term in metallurgy and engineering for a class of tool steels that retain hardness at high temperatures.

• 高こう速そく度ど鋼こうは切せっ削さく工こう具ぐによく使つかわれる。

  High-speed steel is often used for cutting tools.