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| well casing string; well protection by casing | |||
| casing (скважины); lining with casing | |||
| well casing (Yeldar Azanbayev) | |||
| крепление обсадными трубами: 14 phrases in 6 subjects |
| Drilling | 1 |
| Mining | 3 |
| Oil / petroleum | 6 |
| Oil and gas | 1 |
| Oil and gas technology | 1 |
| Oilfields | 2 |