用一般的折弯模很难达到不擦伤表面，对此，提出了一种新的折弯模结构，并分析了其成形过程。
It is so difficult to get non-scrape surface using ordinary bending die. Thus a new bending die structure is provided, and its forming process is analyzed as well.
他的捏拧擦伤了桃子的表面。
在高速和轻载工况条件下，打滑擦伤往往成为圆柱滚子轴承的主要失效形式，而表面粗糙度对轴承打滑损伤有很大的影响。
Under high speed lightly loaded conditions, skidding damage often becomes one of the main damage forms for cylindrical roller bearings while surface roughness has great effect on skidding damage.
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