The results have important role on further theoretical research, and improving the technical process and spreading area of application for cross wedge rolling.
研究结果对深入进行楔横轧理论研究，提高其工艺水平，扩展其应用范围有重要作用。
Crack spreading area and transient breaking are observed, typical fatigue striations, fatigue steps and secondary cracks are observed on some of the fractures.
微观上在少数油管断口中观察到了典型的疲劳辉纹，在很多断口上观察到了疲劳台阶和二次裂纹。
Then, the method and flowchart of post-earthquake fire spreading area is made based on the fire hindrance distance.
然后，在阻止火蔓延距离的基础上，确定了地震次生火灾蔓延范围模拟的方法以及流程。
Then, the method and flowchart of post-earthquake fire spreading area is made based on the fire hindrance distance.
然后，在阻止火蔓延距离的基础上，确定了地震次生火灾蔓延范围模拟的方法以及流程。
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