Fatigue crack length

• 疲劳裂纹长度

Fatigue crack length的用法和样例：

例句

1. That is, the load is dropped off in the proportion to the crack length.
   这就是说，载荷随裂纹长度的增加而按比例地下降。
2. The natural frequency of specimen decreases as the crack length increases.
   随着裂纹长度的增加，试样的固有频率逐渐减小。