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| продавливаемая цементировочная пробка | |||
| верхняя цементировочная пробка | |||
| скребковая пробка | |||
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wiper plug : 17 phrases in 6 subjects |
| Drilling | 2 |
| Oil / petroleum | 6 |
| Oil and gas | 1 |
| Oilfields | 1 |
| Sakhalin | 6 |
| Sakhalin R | 1 |
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