EU Trademark Classification EU01 Chemicals 阻焊剂（化学制剂）（4838） Class 01 Solder mask [chemical preparations] 4838 阻焊剂（化学制剂） Chinese 阻焊剂（化学制剂） English Solder mask [chemical preparations] Site ref. 4838 Class 01 Included in Harmonised Database (HDB)