EU Trademark Classification EU07 Machinery 活塞（内燃机部件）（16753） Class 07 Pistons [internal combustion engine parts] 16753 活塞（内燃机部件） Chinese 活塞（内燃机部件） English Pistons [internal combustion engine parts] Site ref. 16753 Class 07 Included in Harmonised Database (HDB)