The technology of developing quality and strong pick is found by researching the hard metal alloy, pick-body material, weld gap, technique of braze welding and heat treatment.
通过对硬质合金、截齿体材质、焊缝间隙、钎焊及热处理工艺的研究，寻找出了研制优质强力截齿的技术途径。
Metal heat protective coating material applies on each links of metal hot working-casting. Forging and heat treatment in different degree.
金属加热保护涂料在金属热加工各个环节——铸、锻、热处理中不同程度获得了应用。
The university is four years, I studied in the department of mechanical engineering, specialities studied are metal material and heat treatment .
大学四年，我在机械工程系学习，所学的专业是金属材料及热处理。
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