In the cryogenic temperature field, the change of steel structure is random and ultramicroscopic, and it is also a kind of progressive changing process.
在超低温温度场中，钢组织结构的转变是随机、超显微的，而且是一种逐渐的转变过程。
Temperature field of 7050 aluminum alloy during its cryogenic treatment is calculated with ANSYS program.
应用有限元分析软件ANSYS计算了7050铝合金深冷处理时的温度场。
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