B.8.7) Cracks are evaluated according to crack length ratio (CLR) and crack thickness ratio (CTR) by measuring the total crack length and extend of stepwise cracking respectively.

• 根据裂纹长度率（CLR）和裂缝厚度率（CTR），通过测量总裂纹长度和分别扩大逐步龟裂，对裂缝进行鉴定。