EU Trademark Classification EU11 Lighting, heating and air conditioning 加热设备用烟道（29273） Class 11 加热设备用烟道 29273 Chinese 加热设备用烟道 English Flues for heating apparatus Site ref. 29273 Class 11 Included in Harmonised Database (HDB), Nice Alphabetical List, WIPO Madrid Goods and Services (MGS)