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| English | Russian |
| sparse drilling grid | редкая сеть бурения (Igor Kravchenko-Berezhnoy) |
| sparse interlayers | редкие прослои (vbadalov) |
| sparse seismic coverage | небольшой объём сейсморазведки (Sparse seismic coverage has always prevented a detailed and unambiguous interpretation of complicated structures. ArcticFox) |