EU Trademark Classification EU01 Chemicals Additives (Chemical -) for use in drilling muds Class 01 Additives (Chemical -) for use in drilling muds 968 钻井泥浆用化学添加剂 Chinese 钻井泥浆用化学添加剂 English Additives (Chemical -) for use in drilling muds Site ref. 968 Class 01 Included in Harmonised Database (HDB)