刀痕是汉语词汇，拼音是dāo hén，解释为刀伤留下的瘢痕。
加工残留刀痕对轴的横向断裂起了促进作用。
The improper processing procedure also promoted the shaft broken.
将过渡圆弧部分抛光以减少刀痕所引起的切口效应。
Reduce notch effects from circumferential grooves by cross polishing the fillet area.
工件内表面存在刀痕等机加工缺陷，造成应力集中促进了裂纹的形式。
The manufactured defects on the inside of the drilling collar as stress concentration location play an important part in the initiation of the cracks.
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