EU Trademark Classification EU37 Construction and repair 防止灰尘进入建筑物（61965） Class 37 Prevention of dust ingress to buildings 61965 防止灰尘进入建筑物 Chinese 防止灰尘进入建筑物 English Prevention of dust ingress to buildings Site ref. 61965 Class 37 Included in Harmonised Database (HDB)