 |
| |||
| perf csg (perforated casing) | |||
| perforated casing; perforated string; perforated casing string | |||
| перфорированная обсадная колонна: 19 phrases in 7 subjects |
| Drilling | 2 |
| Makarov | 1 |
| Oil / petroleum | 6 |
| Oil and gas technology | 5 |
| Oilfields | 1 |
| Sakhalin R | 1 |
| Technology | 3 |