Solid steel frame structure design It is suitable for album material?coated paper and thick book glue-binding. High-power milling back with 24 double-layer tungsten steel sun knives Spine preparation by sophisticated milling and notching device After spraying glue, the Inner book spine can open at 180 degree. Books can completely horizontally put on a table. And PUR hot melt adhesive has hot and cold resistant. Intelligent control and LCD display Rotated speed control Button design S2000LP came with air pump and import induced-draft device.