Higher quality steels have been required since train speeded-up, resulting in some problems such as the quality and type of ferroalloys.
火车提速后，对钢材质量提出了更高的要求，从而引发了铁合金的质量和品种问题。
The advanced steelmaking practices are to be extensively utilized to put an end to the backwardness of sort and quality of cold work tool and mould steels in China.
我国要改变冷作工模具钢质量和品种方面的落后面貌，必须推广应用先进的炼钢工艺。
The effect of electrode wear on indentation depth and weld quality was studied for welding galvanization steels.
进而分析了点焊镀锌板的电极磨损对压痕深度与焊点质量的影响。
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