EU Trademark Classification EU11 Lighting, heating and air conditioning 炼油厂用火炬烟囱（30623） Class 11 炼油厂用火炬烟囱 30623 Chinese 炼油厂用火炬烟囱 English Stacks (Flare -) for use in oil refineries Site ref. 30623 Class 11 Included in Harmonised Database (HDB)