指导研究和设计，开发和解释集中，提取，提炼和处理金属矿石的过程和机械。
Conduct studies and design, develop and specify the processes, and machinery to concentrate, extract, refine and process metals from ores.
此单元组的工人操作单一功能的机器或作为较大的生产过程中的一部分的机械，来处理矿石和金属制品。
Workers in this unit group operate single-function machines or machinery that is part of a larger production process to process mineral ore and metal products.
金属热处理是机械制造中的重要工艺之一，正火是生产中常用的热处理工艺。
Metal heat treatment is one of important mechanical procedures, and normalizing is used frequently during the heat treatment.
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