设计随机分组实验研究。
造模后开始进行分组实验处理，正常组和模型组常规喂养，不做熏蒸处理；
Those in the normal group and model group were feed routinely without fumigation and steaming therapy.
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.
应用推荐