EU Trademark Classification EU42 Scientific and technological services 计算机软件的维护和升级（71531） Class 42 计算机软件的维护和升级 71531 Chinese 计算机软件的维护和升级 English Maintenance and upgrading of computer software Site ref. 71531 Class 42 Included in Harmonised Database (HDB), WIPO Madrid Goods and Services (MGS)