This category handles specialized heat treatment equipment other than general heat treatment furnaces and quenching devices. It includes professional heat treatment equipment such as induction hardening equipment, laser heat treatment systems, plasma heat treatment devices, vacuum carburizing equipment, gas carburizing systems, nitriding equipment, shot peening machines, and surface modification devices. These equipment groups are designed for special material property improvements such as surface hardening of metal parts, wear resistance enhancement, and fatigue strength improvement, and are essential facilities for high-quality production of automotive parts, tools, and machine components. They handle localized heating and special atmosphere processing that are difficult to achieve with conventional furnace-type heat treatment.