·The function of CNC controller ·Several sets of commonly used instructions in CNC machining centers ·Analysis of Automotive Parts Processing Process ·Physicochemical Function and Welding Technology of CNC Precision Parts Processing ·The principle of CNC precision machining technology. ·Selection of cutting tools for CNC machine tools ·CNC blade (tool) choice ·Pouring hardware processing raw material performance indicators ·Common faults and solutions of carving machine three -axis ·The main role of the connector contact plating using the electroplating process