... has a full range of gas products, including industrial gas, electronic gas, standard gas, mixture gas and liquefied gas, such as high purity ... 200 barNitrogenN299.9%150 bar/200 barQF-2Replacement gas and protection gas for chemical industry, metallurgy , and electric industry99 ... welding, stainless steel smelting, container, steel structure manufacture, mold processing, ect.99.99%150 bar/200 bar99.999 ...