Metal welding, cutting and a variety ofcombustion-supporting gas for combustion systemand some oxidizing gas technical process gas, etc. Metallurgical industry, including steel, non-ferrous metal smelting process, all have extensive use of oxygen, it is obviouslystrengthening smelting processand increase energy efficiency. Machinery industry: metal welding, cutting can greatly improve the working efficiency Chemical industry: manufacturing pharmaceutical, dyestuff, explosives and other chemical products, in addition to strengthen the production (such as the production of yellow phosphorus by oxygen blowing method, spray oxygen carrier coal, etc.) Electronic industry: except for combustion-supporting gas or gas oxide semiconductor integrated circuit,oxygenis one of the indispensable high purity gases in the line.Additionally, it is the important raw material of gas optical fiber It is used widely in national defense