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。
It can guarantee the coasting body not over-sink or over-float with the support of light-load spring under light load and heavy-load spring under heavy load.
轻载时由轻载弹簧支承，重载时重载弹簧加入承重，保证惯性体不会超限下沉或上浮；
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