This category handles special machine tools other than lathes, milling machines, grinding machines, drilling machines, and press machinery. It includes specialized machines such as electrical discharge machining (wire-cut and die-sinking), laser processing machines, waterjet cutting machines, ultrasonic machining, electrochemical machining, gear cutting machines (hobbing and shaping machines), broaching machines, honing machines, keyway cutting machines, spline cutting machines, thread cutting machines, tapping machines, and reaming machines. These machine tools are used for precision machining of hard materials that are difficult to process with conventional cutting methods, complex shape processing, and special surface treatments, primarily in high-precision fields such as aerospace, medical equipment, and precision parts manufacturing.