Prasiolite, an olive-colored material, is produced by heattreatment.
橄榄色人造绿堇云石通过热处理产生。
2
As Steelworkers, we are interested in the heattreatment of metals, because we have to know what effects the heat produced by welding or cutting has on metal.
钢铁工人最感兴趣的东西莫过于金属的热处理，因为我们得了解焊接与切割时产生的热对金属的影响。
3
Then, if needed, the pipe undergoes heattreatment or just goes to the quality testing line.