EU Trademark Classification EU19 Building materials Trench drains Class 19 Trench drains 40876 排水沟（混凝土排水构筑物） Chinese 排水沟（混凝土排水构筑物） English Trench drains [concrete drainage structures] Site ref. 40876 Class 19 Included in Harmonised Database (HDB) Name qualifier concrete drainage structures