This standard specifies the general terms of metal cutting machine tools, lathes, milling machines, drilling machines, boring machines, grinding machines, gear processing machines, threading machines, planers and slotting machines, broaching machines, sawing machines, combined machine tools and combined machine tools. Automatic lines, engraving machines, pipes Terms and definitions of machine tools, machine tool accessories, motions, parameters, parts and machining methods. This standard applies to general-purpose metal cutting machine tools (hereinafter referred to as machine tools).