cracking reason的用法和樣例：
例句
- 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(jìn)行客車(chē)車(chē)架縱梁開(kāi)裂原因分析及設計改進(jìn)。 - This paper anaIysed the reasons at edge-turnup cracking of industrial boiler steel pipe by means of chemical analysis and metallographic examination.
采用化學(xué)分析和金相檢驗等方法對工業(yè)鍋爐煙管扳邊開(kāi)裂原因進(jìn)行了分析。
