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| шариковый пишущий элемент | |||
| roller ball: 17 phrases in 13 subjects |
| Armored vehicles | 1 |
| Automated equipment | 2 |
| Construction | 2 |
| Drilling | 1 |
| Electronics | 1 |
| General | 1 |
| Military | 1 |
| Mining | 1 |
| Oil / petroleum | 2 |
| Oil and gas | 1 |
| Oil and gas technology | 1 |
| Oilfields | 2 |
| Technology | 1 |
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