High-performance Multi-series Expansion Units: Hang oxygen expanders can be used to support small-scale air separation to 100,000 and 120,000 super large-scale air separation, and have been successfully applied to 60, 80, 80,000 and 120,000 large-scale air separation equipment. . All-liquid turbine expansion units, natural gas expansion generating units, chemical exhaust gas recovery expanders, hydrogen turbine expansion units, and special turbine expansion units manufactured by Hangzhou Oxygen have also been successfully applied, and their efficiency and reliability have reached the international first-class level.