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为提高铸件尺寸精度和表面光洁度,用冷硬树脂砂代替传统粘土砂的趋向在铸造行业日益增长,随着树脂砂工艺的推广和应用,树脂砂的旧砂再生已逐渐被人们所重视。旧砂再生
In order to improve the dimensional accuracy and surface finish of castings, the tendency of replacing the traditional clay sand with chilled resin sand is increasing day by day in the casting industry. With the popularization and application of sand resin technology, regeneration of resin sand has gradually been taken seriously. Old sand regeneration