 |
| |||
| Down-hole jewelry (a generic term for all the special tools that are incorporated into an oil or gas well Sweetlana) | |||
| downhole jewelry (academic.ru tat-konovalova) | |||
| скважинные инструменты, оборудование: 6 phrases in 4 subjects |
| Drilling | 3 |
| Oilfields | 1 |
| Production | 1 |
| Technology | 1 |