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| шестигранная головка | |||
| 六角头: 45 phrases in 9 subjects |
| Automobiles | 2 |
| Construction | 3 |
| Drilling | 1 |
| General | 27 |
| Mechanic engineering | 1 |
| Oil / petroleum | 1 |
| Oil and gas | 1 |
| Oil processing plants | 1 |
| Technology | 8 |
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