Gas used in medical diagnostics and life assistance. Medical gases include ZO, including: Blood gas detection, lung function test, cardiopulmonary test, surgical lasers, anesthesia monitoring, respiratory monitoring, medical research, radiological tracing and so on.

Medical oxygen is mainly used in the treatment of patients and hypoxia, belonging to drugs, administered by the State Department of Health and Drug Administration. China National Standards Administration promulgated the C*1; R822} Medical Oxygen "national standards, required to be implemented in December 1988 1.