英语翻译are easily machined and weled.Due to their low carbon content_其他解答

英语翻译
are easily machined and weled.Due to their low carbon content,these steels cannot be hardened except by case hardening.

人气：497 ℃　时间：2020-05-19 06:41:07

解答

低碳钢柔软,坚韧,易于机器加工.由于碳含量低,这种钢铁只有用表面强化的方法使其坚硬