EU Trademark Classification EU37 Construction and repair 修理航空器热交换器（62290） Class 37 Repair of aircraft heat exchangers 62290 修理航空器热交换器 Chinese 修理航空器热交换器 English Repair of aircraft heat exchangers Site ref. 62290 Class 37 Included in Harmonised Database (HDB), WIPO Madrid Goods and Services (MGS)