本论文主要是围绕钢管打捆机研制开发进行的。
The main topic of this paper is about steel pipe strapping machine.
同时还对含表面缺陷钢管裂纹形态的疲劳扩展演变规律进行了分析。
The evolution feature of surface crack shape is analysis too in this paper.
同时还对含表面缺陷钢管裂纹形态的疲劳扩展演变规律进行了分析。
The evolution feature of surface crack shape is analysis too in this paper.
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