EU Trademark Classification EU19 Building materials 建筑用非金属烟道（39743） Class 19 Flues (Non-metallic -) for use in building 39743 建筑用非金属烟道 Chinese 建筑用非金属烟道 English Flues (Non-metallic -) for use in building Site ref. 39743 Class 19 Included in Harmonised Database (HDB)