While using lever rule, the fundamental law of phase diagram and use of standard terminology must be followed.
应用杠杆定律时，必须遵循相图的基本规律并使用标准术语。
In this paper, relationship between full-decarbonisation temperature of high-carbon steel on surfaces and their phase structures have been explained with phase rule and Fe-Fe_3C phase diagram.
用相律解释了由实验得出的表面高碳钢发生全脱碳的温度与其金相组织的对应关系。
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