... convenient, and more stable Improve the yield rate. More automatic Working width: 2000mm 2200mm 2500mmDiameter of polishing roller: Φ268mm ... , within ± 2degrees.Increase the automatic on-line feature, with high active expanding device, automatic correcting device, auto-matic stop ... hammer device, it will be more automatic and will reduce the labor when on-line. Chinese Double Rollers Polishing Machine