EU Trademark Classification EU42 Scientific and technological services Oil-fields (Preparing surveys of -) Class 42 Oil-fields (Preparing surveys of -) 71632 油田勘测的编制 Chinese 油田勘测的编制 English Oil-fields (Preparing surveys of -) Site ref. 71632 Class 42 Included in Harmonised Database (HDB), WIPO Madrid Goods and Services (MGS)