Liquid nitrogen can be used for the environmental stress screening of superconducting refrigerants and electronic components in the electronics industry. Liquid nitrogen can be used for cloud seeding in the field of meteorology. Liquid nitrogen can be used for underground fire suppression in mining industry. Liquid nitrogen can be used in the aerospace field. Liquid nitrogen can be used as a propellant of rocket fuel, and the high pressure generated by its gasification pushes the rocket fuel to the combustion chamber.
When handling a small amount of liquid nitrogen, wear low-temperature antifreeze gloves and long sleeves to avoid frostbite caused by careless contact with the body. For liquid nitrogen transportation and distribution or operation of a large amount of liquid nitrogen, it is necessary to wear a full face mask, wear low-temperature anti-freezing gloves, wear long clothes, trousers and fully covered shoes to prevent direct contact with the skin. At the same time, attention should also be paid to the danger of hypoxia and even suffocation due to the large amount of nitrogen generated by the gasification of liquid nitrogen, which displaces the oxygen around.
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