EU Trademark Classification EU01 Chemicals Air void formers being additives for concrete Class 01 Air void formers being additives for concrete 1083 用作混凝土添加剂的引气剂 Chinese 用作混凝土添加剂的引气剂 English Air void formers being additives for concrete Site ref. 1083 Class 01 Included in Harmonised Database (HDB)