EU Trademark Classification EU11 Lighting, heating and air conditioning 防止烟气扩散用风门（28788） Class 11 Draught dampers for preventing the spread of fumes 28788 防止烟气扩散用风门 Chinese 防止烟气扩散用风门 English Draught dampers for preventing the spread of fumes Site ref. 28788 Class 11 Included in Harmonised Database (HDB)