日期：
来源：雅诚德英语网
The experimental results showed that the presence of RE could obviously accelerated nitriding process of LD steel.
结果表明：稀土对LD钢的氮化过程有明显的催渗作用；
The experimental results showed that the presence of RE could obviously accelerated nitriding process of LD steel.
结果表明：稀土对LD钢的氮化过程有明显的催渗作用；