scuff mark

英 美
  • 擦伤
  • mark n.记号;痕迹;分数;商标v.弄污;打分;留意;做标记
  • scuff v.磨损;拖着脚走n.拖着脚走;磨损
    1. Also, the valves close with a great deal of impact, which may crack or break the valves and scuff the camshaft and followers.
      此外,气门关闭撞击力大,可能撞裂或撞碎气门,并擦伤偏心轮轴和随动机构。