EU Trademark Classification EU17 Rubber and plastics goods 管道用非金属联接件（37793） Class 17 管道用非金属联接件 37793 Chinese 管道用非金属联接件 English Non-metallic couplings for pipes Site ref. 37793 Class 17 Included in Harmonised Database (HDB), WIPO Madrid Goods and Services (MGS)