EU Trademark Classification EU37 Construction and repair 石油和天然气钻探（61858） Class 37 Oil and gas drilling 61858 石油和天然气钻探 Chinese 石油和天然气钻探 English Oil and gas drilling Spanish perforación de petróleo y gas Site ref. 61858 Class 37 Included in Harmonised Database (HDB), TM5 ID List