Liquid nitrogen is applied to metal through fittings or static fitting assemblies in machining, avoiding high temperature oxidation and maintaining the surface quality of parts. Parts soaked in liquid nitrogen can be machined for extended service life.

       The use of liquid nitrogen cooling during metal cutting has the advantages of long service life and high surface quality. Science and technology High-purity nitrogen is a common carrier gas in gas chromatography.

       In scientific instruments or scientific experiments, liquid nitrogen is an important source of cold. For example, the single-crystal lithium detectors of EDAX spectrometers must be stored and used at liquid nitrogen temperatures. Many tests are performed at low temperatures, and the cooling performance is usually provided by liquid nitrogen. Liquid nitrogen can be used as various cold traps, cold pumps and low temperature superconducting cold sources.