cracking reasons的用法和樣例：
例句
- This paper anaIysed the reasons at edge-turnup cracking of industrial boiler steel pipe by means of chemical analysis and metallographic examination.
採用化學分析和金相檢驗等方法對工業鍋爐煙管扳邊開裂原因進行了分析。 - The paper applies the finite element method to the coach frame longitudinal beam crack reason analysis and design improvement.
應用有限元法進行客車車架縱梁開裂原因分析及設計改進。
