1.Computer control 2.Punching by air-operated 3.Photosensitive tracking for length 4.Stepping motor material-feeding Feature:Computer control, stepping motor material-feeding, photosensitive tracking for length...Punching by air-operated. Use:Suitable for composite film, aluminizer, polyethylene/ polypropylene heat sealing materials, air-laid paper, non-woven, spunlace non-woven fabrics, etc., ...