A study has been done over the small crack growth rate for kinds of carbon steels under push pull and rotating bending.

对多种碳素钢在拉伸压缩和旋转弯曲负载下的微小裂纹扩展速率进行了研究。

youdao

All the result demonstrated the relationship between the pull out property and the crack propagation in matrix qualitatively.

实验结果定性地证明了纤维的拉拔特性对基体裂纹扩展的影响关系。

youdao

But after all the nerves, when it's time to crack on with the interview, the boys pull no punches.

BBC: BBC Spotlight's Justin Leigh gets a grilling