EU Trademark Classification EU37 Construction and repair 锅炉清洁服务（60638） Class 37 锅炉清洁服务 60638 Chinese 锅炉清洁服务 English Boiler cleaning services Site ref. 60638 Class 37 Included in Harmonised Database (HDB), Nice Alphabetical List, WIPO Madrid Goods and Services (MGS)