high speed steel

名词 n.
中文释义
发音 hīʹspēd stēl'

英文释义

名词 n.
  1. A kind of tool steel, invented in the early 20th century, which retains its hardness and temper at high temperatures (at which previous kinds of tool steel would soften), thus allowing cutters made from it to be employed at higher cutting speeds than were previously practical. countable,uncountable

词形变化

high speed steels plural high-speed steel alternative
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