... Annealing, Tempering for Surface, inner bore, local, integral of All kinds of hardware tools, motor-power, hydraulic pressure, pneumatic element ... , gear wheel, valve, ball pin , Etc. and hardening of large size machine tool guideways and Ductile cast iron.4 ... measurement, realize automatic control the temperature, improve the quality of heating, simplify worker operatingSpecifications: Model: WH-VI-50 ...