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A rare gas. Used as a protective gas for arc welding (cutting) stainless steel, magnesium, aluminum, and other alloys. It is also used in the smelting of steel, aluminum, titanium and zirconium. Argon emits a purple glow when discharged and is also used in lighting technology and filling fluorescent lamps. Photocell, lighting tube, etc.
It is used in Chemical industry、National defence industry、Medical treatment and so on
Ammonia is an important chemical product, nitrogen fertilizer industry, organic synthesis industry and the manufacture of nitric acid, ammonium salt and soda ash are inseparable from it. Ammonia is easy to liquefy into liquid ammonia, which absorbs a lot of heat when vaporized, so it can also be used as a refrigerant.
The preparation of Automobile tire inflation、chemical fertilizer、nitric acid compound and other compounds