EU Trademark Classification EU42 Scientific and technological services 石油工业地球物理勘探（71312） Class 42 Geophysical exploration for the oil industry 71312 石油工业地球物理勘探 Chinese 石油工业地球物理勘探 English Geophysical exploration for the oil industry Site ref. 71312 Class 42 Included in Harmonised Database (HDB)