EU Trademark Classification EU01 Chemicals 用于排水的硝酸钙溶液（1521） Class 01 用于排水的硝酸钙溶液 1521 Chinese 用于排水的硝酸钙溶液 English Calcium nitrate solutions for use in drainage Site ref. 1521 Class 01 Included in Harmonised Database (HDB), Nice Alphabetical List, WIPO Madrid Goods and Services (MGS)