Heating elements; infrared heating panels; far-infrared electric fires for industrial purposes; far-infrared electric fires used in drying apparatus and installations; far-infrared electric fires used in recuperators; far-infrared electric fires used in steamers; far-infrared electric fires used in evaporators; far-infrared electric fires used in distillers; far-infrared electric fires used in heat exchangers; far-infrared electric fires used in industrial furnaces; far-infrared electric fire...