... of the sheet.2-6,upper blade holder has inward tilting structure to facilitate material feed in and also enhance accuracy ... sections function of aligning with light.2-8,optional:rear material holding device.2-9,protective grating controlled by electrical ... system, China C, seals , JapanD, main motor,China E, blade, China material 6CrW2Si4,inspect standard: National standard,GB/T 14349-935,documents ...