检查任何严重磨损的零件，如有需要将其更换。
Check for any seriously worn parts and replace if necessary.
当你把车开去维修时，你希望机修工把磨损的零件换成新的。
When you take your car to be serviced or repaired, you expect the mechanic to replace any worn or damaged parts with new ones.
WC型管状焊条是一种高硬度、高耐磨性的堆焊焊条，广泛用于强烈磨损的零件上。
WC-cored electrode is a repair welding electrode with high hardness and high wear resistance, which has been widely used in circumstance with violent wear.
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