The ground area was also checked with dye-penetrant to ensure that no crack tip remained.
打磨区也用着色渗透剂进行了检查，以便确保无裂纹尖端留存。
2
The runners of 6 operated generating unit of Ertan Hydro Station have been checked and no crack on the primary weld of the field welding position is observed.
二滩水电站已全部投运的6台机转轮经停机检查，现场焊接的主焊缝无裂纹。
3
Stability of the crack should be checked by the method of fracture mechanics, which should be a supplemental stability condition of the gravity DAMS.