冲孔凸模磨损是模具失效的主要形式之一。
The consequence caused by crane's metal structure to lose efficacy is very serious.门机金属结构的失效事故,后果往往非常严重。
Analytical method of bearing lose efficacy and the key point of bearing lose efficacy of mine machinery are introduced.介绍轴承失效分析方法及煤矿机械轴承失效分析侧重点。