Industrial gas is the basis of the whole industry and plays an important role in the national economy. It is widely used in metallurgy, petroleum, petrochemical, chemical industry, machinery, electronics, aerospace and other fields. It also plays an important role in national defense construction and medical and health fields. After decades of development, China's gas industry has made remarkable achievements in unit manufacturing and gas production, with certain strength, especially in Asia and developing countries. Like water and electricity, it is vividly compared to the "blood" of industry.
