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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 a las frases, 2 temas |
| Tecnología | 1 |
| Tecnología de petróleo y gas | 2 |