EU Trademark Classification EU01 Chemicals 掺杂气体（非医疗用途）（2734） Class 01 Doping gases [other than for medical use] 2734 掺杂气体（非医疗用途） Chinese 掺杂气体（非医疗用途） English Doping gases [other than for medical use] Site ref. 2734 Class 01 Included in Harmonised Database (HDB)