Pharmaceutical industry: used to make contraceptive drugs. Atomic absorption analyzer: used as carrier gas. The important use of dissolved acetylene is metal welding and cutting, spraying, surface quenching and heat processing. The earlies…

Industrial use: In industrial production, through the liquid compressed air fractionation method to obtain the liquid nitrogen, can be used as a depth refrigerant, due to its chemical inertness, can directly contact with biological tissue,…

Helium widely used military-industrial complex, scientific research, petrochemical, refrigeration, medical, semiconductor, pipeline leak detection, superconducting experiment, metal manufacturing, deep-sea diving, high precision welding, o…

1.Synthetic ammonia nitrogen provides plentiful raw materials for nitrogenous fertilizer manufacturing. 2.Ammonia is also used in production of various amino, acyl compounds and dynamite manufacturing also takes up a lot of ammonia. 3.Ammo…

Carbon dioxide is used widely, it is only inferior to Oxygen. 1.It used to make carbonated drinks. 2.Fire extinguishing agent: the extinction of electrical equipment, precision instruments, valuable production equipment and book documents …