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20.11 - Manufacture of industrial gases
This class includes: - manufacture of liquefied or compressed inorganic industrial or medical gases: . elemental gases . liquid or compressed air . refrigerant gases . mixed industrial gases . inert gases such as carbon dioxide . isolating gases
This class excludes: - extraction of methane, ethane, butane or propane, see 06.20 - manufacture of fuel gases such as ethane, butane or propane in a petroleum refinery, see 19.20 - manufacture of gaseous fuels from coal, waste etc., see 35.21