Based on above analysis and experiments, the surface quality of flat tube is improved, then, select the brigade-laboratory method to improve the brazing process.
在以上分析和实验的基础上，改善扁管表面质量的同时，运用分组实验的方法改进工艺。
Based on above analysis and experiments, the surface quality of flat tube is improved, then, select the brigade-laboratory method to improve the brazing process.
在以上分析和实验的基础上，改善扁管表面质量的同时，运用分组实验的方法改进工艺。
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