·2,447,543篇论文数据，部分数据来源于NoteExpress
The results showed that the fracture was of typical fatigue fracture, and surface defects were the main factor resulting in the failure of the air valve spring.
结果表明，断裂呈现典型的疲劳断裂特征，材料表面缺陷是引起该弹簧疲劳断裂的主要原因。
youdao
应用推荐
模块上移
模块下移
不移动