Specification for steel undee spring used in electric machines 电机用钢质波形弹簧.技术条件
2.
Inspection and preventation control of plate undee distortion after welding 板材焊后波浪变形的检验及预防控制
3.
It showed the performance of anti - aging is good . the modified asphalt may be looked upon materials for highway road . the undee samdwich of the modified asphalt was characterized by sem 通过扫描电子显微镜( sem )分析表明改性后沥青呈波浪形层状结构，这一结构的形成同时改善了改性沥青的高低温性能。
4.
The performance of high and low temperature was improved simultaneity because the materials of modified asphalt had structure of the undee samdwich . the modified asphalt was characterized by element analysis , tem , xrd , tg and ft - ir . we discussed the possible mechanism of the modification 另外，还采用了透射电子显微镜( tem ) 、 x射线衍射( xrd ) 、热重摘要分析( tg ) 、红外光谱分析( ft - ir )等分析方法对改性沥青进行了表征，探讨了可能的改性机理。
