EU Trademark Classification EU01 Chemicals Silica for use as a polyolefin catalyst Class 01 Silica for use as a polyolefin catalyst 4723 用作聚烯烃催化剂的二氧化硅 Chinese 用作聚烯烃催化剂的二氧化硅 English Silica for use as a polyolefin catalyst Site ref. 4723 Class 01 Included in Harmonised Database (HDB)