加热长度变化率
Rate of change in heating length
以上为机器翻译结果，长、整句建议使用 人工翻译 。
分析了原因，提出了从工艺着手降低加热长度变化率的方法，以及加热长度变化率的简易鉴定方法。
Based on analysis of the causes, method for reducing heated length variation as well as simplified identifying approach are proposed aiming at its technological process.
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