Ultra-low temperature freezer is mainly used in industrial cold treatment, so that the metal structure matrix organization produced on the uniform, fine and diffuse carbide precipitation. This carbide precipitation phenomenon will give the metal wear resistance and friction performance to bring a significant increase in hardness will also increase, and will directly improve the life of wear parts. Ideal product to replace liquid nitrogen. Used for cold shrinkage of copper bushings, bearings, etc. Widely used in precision machinery assembly. Applied to large equipment (automobiles, large construction machinery, aircraft parts, aerospace equipment parts, military equipment parts ultra-low temperature testing. Can be used for touch screen, display frozen degumming, disassembly.