Used the research method of metal physics, the influence of on-line normalizing to structure and properties of N80-tube has been researched.
利用金属物理实验方法，研究了在线常化工艺对N80 钢管组织和性能的影响。
Used the research method of metal physics, the influence of on-line normalizing to structure and properties of N80-tube has been researched.
利用金属物理实验方法，研究了在线常化工艺对N80 钢管组织和性能的影响。
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