EU Trademark Classification EU37 Construction and repair Installation, repair and maintenance of boiler tubes Class 37 Installation, repair and maintenance of boiler tubes 61534 锅炉管的安装、修理和维护 Chinese 锅炉管的安装、修理和维护 English Installation, repair and maintenance of boiler tubes Site ref. 61534 Class 37 Included in Harmonised Database (HDB)