worn spot
英
美
[网络] 磨损斑点
双语例句
- This is to introduce the technology of weld patching in site for damaged or worn rail that Nanjing Track Maintenance Subdivision, which involves making good the flaw, preheating the spot to be welded, post-weld grinding, flaw detecting etc.
介绍南京工务段对伤损钢轨在现场进行快速焊补的工艺，包括清除缺陷、对补焊位置预热、焊补后磨平，并进行探伤检查等，取得了较好的效果。