武汉某公司的复合材料生产线上的打磨机存在打磨缺陷，不能实现材料表面完全打磨。
In a certain company of Wuhan, there are some faults with the belt grinding. As a result, belt grinding of material surface is not complete.
打磨焊缝表面缺陷或机械损伤后的厚度小于母材的厚度。
Seam surface defect after grinding or thickness is lower than base material after mechanical treatment.
技术上合理的防腐蚀保护不允许出现上述的缺陷，所以在进行任何涂刷前应将其表面打磨光滑以避免出现这些缺陷。
Should the said defects not allow for a technically sound corrosion protection, then these defects are to be ground smooth before any paint application.
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