... of support and enhance shearing quality.2-3, mechanical rear stopper with manual fine tuning and digital indication.2-4, clearance in ... in sections function of aligning with light.2-8,optional:rear material holding device.2-9,protective grating controlled by ... standard,GB/T 14349-935,documents additional:5-1,operation manual (hydraulic system, electricity principle drawing and foundation drawing )5- ...