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| casing buttress thread (Yeldar Azanbayev); BCSG (маркировка резьбы Yeldar Azanbayev) | |||
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трапецеидальная резьба обсадных труб : 8 phrases in 5 subjects |
| General | 1 |
| Oil / petroleum | 3 |
| Oil and gas | 1 |
| Sakhalin | 2 |
| Technology | 1 |
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