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