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| нижний сальник | |||
| нижний пакер | |||
| bottom packer: 25 phrases in 8 subjects |
| Drilling | 1 |
| Geology | 1 |
| Mining | 1 |
| Oil / petroleum | 9 |
| Oil and gas technology | 5 |
| Production | 1 |
| Sakhalin | 3 |
| Technology | 4 |
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