6
Metal building materials; steel structures; sheets, tubing, pipes of steel, cast iron or metal alloys; tanks of metal; containers of metal (storage, transport); hoppers (non-mechanical) of metal; pipe clack valves of metal; fittings of metal for compressed air or gas ducts; reinforcing materials of metal for building; High-pressure pipelines (of metal); pot hooks of metal; manifolds of metal for pipelines; turntables (railways); cladding of metal for construction and building; pipes of metal; pipework of metal; pipes and tubes of metal; chutes and outfalls of metal
7
Installations and equipment for steelmaking ovens or shaft furnaces not included in other classes; installations and equipment for loading shaft furnaces, in particular blast furnaces; machines; motors and engines (except for land vehicles); machine coupling and transmission components (except for land vehicles); casting machines; handling machines, automatic (manipulators); conveyors; loading ramps; feeders for steelmaking ovens or shaft furnaces; loading devices for steelmaking ovens or shaft furnaces; equipment for steelworks; hydraulic drives for machines; control devices for machines; hydraulic or pneumatic devices for opening or closing loading devices for steelmaking ovens or shaft furnaces (machine parts); hydraulic or pneumatic devices for opening or closing valves, safety locks for steelmaking ovens or shaft furnaces (machine parts); mechanical discharging and loading hoppers; rotating chutes and outfalls (machines and machine parts); stands for machines; valves (machine parts); valves for machines; gears other than for land vehicles; hydraulic circuits and controls and components therefor not included in other classes; driving chains other than for land vehicles
37
Construction and repair; installation, maintenance and repair of installations, equipment and machinery for steelmaking; construction of metal, mechanical construction; construction engineering; construction, installation, care, repair and maintenance of loading devices for steelmaking ovens and blast furnaces