汽车发动机连杆断裂失效分析 关键词：连杆；低应力疲劳断裂；切削刀痕 [gap=634]Key words: connecting rod; low-stress fatigue fracture; cutter marks
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Cutter author marks 克特着者号码法
The improved roll chamfer cutter has fixed the chronic problem of occurrance of linear marks on the tube surface, and brought about good result and considerable economic benefit.
经对轧辊加工刀具倒角刀的改进，解决了长期困扰生产的钢管表面青线缺陷问题，取得了较好的实际效果和经济效益。
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