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Characteristics: Application:for sew three or four thread at the same time on the leather upper. Apply to all kinds of leather shoes help surface and penetrate seam processing. This machine is three row needles chain sewing machine (can also be a single needle or double needle sewing use), the needle yards evenly, three line parallel beautiful. All parts were manufactured by HAAS CNC machines, high precision machining parts. Using electronic speed motor speed can be flexible, stop the needle position by computer control.