- 钢: sharpen; strop; whet
- 的: 4次方是 The fourth power of 2 i ...
- 回火: tempering; draw the temper; ...
- 钢的: steel
- 回火: 1.(金属的一种热处理工艺) tempering; draw the temper; drawing-back; letting down; drawing (俗称“配火”)2.(氧炔吹管等的火焰向反方向燃烧) flashback; flareback (常引起事故)◇回火爆炸 back draft; 回火处理 [工业] drawing temper; 回火脆性 temper brittleness; 回火度 degree of temper; 回火炉 tempering furnace
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