Glass furnaces; parts and fittings, all for glass furnaces; melting baths, working baths, forehearths, feeder heads, inner crowns, preheating equipment for combustion air and melting stock, all for glass furnaces; feed equipment for melting stock; heating and cooling equipment, all for glass furnaces, for parts and fittings of glass furnaces and for the glass melt; oil and gas burners, all for glass furnaces; mechanical control equipment for glass and gas flows and for radiation apertures in glass furnaces; fireproof ceramic building materials and bricks and mineral insulating materials, all for glass furnaces and for parts and fittings of glass furnaces; electrical metering and control equipment, all for temperature and viscosity, all being parts and fittings for glass furnaces; heating electrodes made of metal for use in glass furnaces; electrically-operated dosing and mixing equipment, all for the supply of raw materials for glass and the delivery of glass melt in glass furnaces; all included in Class 11.;
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