What industries need to use the gas? Such as: oxygen, acetylene, nitrogen dioxide, nitrogen dioxide, etc.

Oxygen: oxygen can supply biological respiration, pure oxygen as a medical emergency supplies, oxygen can also support combustion, and used for gas welding, gas cutting, rocket propellant. These uses are generally the use of oxygen is easy to react with other substances to release heat this property.

Acetylene: welding metal ah, this is the biggest use; preparation of polyacetylene, new conductive plastics. Including synthetic rubber, fiber and so on. It has two unsaturated bonds, industry is used to synthesize polymers more.

Nitrogen dioxide : Nitrogen dioxide is used as an oxidizing agent in chemical reactions and rocket fuel, and as a catalyst in the production of sulfuric acid by the nitrosyl method.

Nitrogen: used in the production of nitric acid, ammonia, calcium cyanide, explosives; for large-scale integrated circuits as a protective gas, used as a light bulb filling gas; refrigerant, can be used as a direct refrigerant for the rapid freezing of food; packaging gases (used to replace the residual air in the packaging containers, in order to prolong the preservation period). Used in fertilizer, medicine, animal husbandry, cold storage and electronic industry. Used in metal smelting, chemical, machining and other industries.