The application of nitrogen spring on cool punching die is introduced, and the elastic components such as 'heavy-load used polyurethane' components is briefly stated.
前言：介绍氮气弹簧在冷冲模中的应用，另外还简单介绍了“高负载用聚氨酯”组件等弹性元件。
The application of nitrogen spring on cool punching die is introduced, and the elastic components such as 'heavy-load used polyurethane' components is briefly stated.
前言：介绍氮气弹簧在冷冲模中的应用，另外还简单介绍了“高负载用聚氨酯”组件等弹性元件。
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