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| OCTG (oilfield casing and tubular goods Аналитик) | |||
| oilfield casing and tubular goods (MichaelBurov); pipe and tube products used in petroleum industry (MichaelBurov); oil country tubular goods (MichaelBurov) | |||
| нефтегазопромысловые трубы: 3 短语, 2 学科 |
| 技术 | 1 |
| 石油和天然气技术 | 2 |