catalysts for use in the industries of manufacture of industrial chemicals, oil processing, petroleum refining, coal refining, desulphurization of petroleum fractions, catalytic pollution control of flue gases, stack gases and exhaust gases, and/or catalytic purification of flue gases, stack gases and exhaust gases
ChemicalsInstallation and maintenance of catalytic emission control apparatus for the industries of manufacture of industrial chemicals, oil processing, petroleum refining or coal refining, desulphurization of petroleum fractions, catalytic pollution control of flue gases, stack gases and exhaust gases, and/or catalytic purification of flue gases, stack gases and exhaust gases
Building Construction and RepairDesigning of catalytic emission control apparatus for the industries of manufacture of industrial chemicals, oil processing, petroleum refining or coal refining, desulphurization of petroleum fractions, catalytic pollution control of flue gases, stack gases and exhaust gases, and/or catalytic purification of flue gases, stack gases and exhaust gases
Computer and Scientific