4
coal, liquid or gaseous hydrocarbon-containing fuels for the production of iron and for heating and melting sponge iron, reducing gases containing carbon monoxide and hydrogen
7
machines for use in plants for the production of molten pig-iron and purified gases; gasification machines for use in plants for the production of molten pig iron and purified gases and parts, namely, pipes and fittings and controls therefor, sold as a unit; machines for the reduction of fine or an introduction of fine substances through tuyeres and parts, namely, pipes and fittings and controls therefor, sold as a unit; cyclones and parts, namely, pipes and fittings and controls therefor, sold as a unit; cyclones and parts, namely, pipes and fittings and controls therefor, sold as a unit
9
electrical process controllers for use in plants for producing pig iron and purified gases
11
furnaces, metallurgical furnaces for the production of molten pig iron and purified gases and parts and controls therefor sold as a unit; metallurgical fluidized bed furnaces and parts and controls therefor sold as a unit
37
construction, maintenance and repair of plants for the production of molten pig iron and purified gases and of the conveying equipment and control equipment for such plants
42
engineering and architectural design services in the planning of the industrial layout and configuration of plants for the production of molten pig iron and purified gases, including planning of the pertaining conveying apparatus and controls therefor