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。
The ground area was also checked with dye-penetrant to ensure that no crack tip remained.
曾在修补其余21个原始焊缝上进行了着色渗透和磁粉探伤检查。
Dye-penetrant and magnetic particle inspection techniques were used on the repaired and other 21 remaining original welds.
曾在修补其余21个原始焊缝上进行了着色渗透和磁粉探伤检查。
Dye-penetrant and magnetic particle inspection techniques were used on the repaired and other 21 remaining original welds.
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