Metal- cutting machine tools, which have two kinds: One is computer numerical control (CNC) machine tool, primarily including CNC lathe, CNC milling & boring machine, vertical machining center, horizontal machining center, gantry machining center, CNC drilling machine, large heavy-duty CNC machine tool, high-speed milling center, laser cutting machine, mass centering machine and various CNC special machine tool and CNC tool carriers and so on; The other one is common machine tool, primarily including common lathe, radial drilling machine, horizontal boring machine, multiple-spindle automatic lathe, various common special machines and accessory for machine tool.