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трапециевидная резьба
| колонны
| трапециевидная резьба | |
| avia. | trapezoidal thread |
| колонна | |
| gen. | upright; triumphal column |
| chem. | tower |
| oil | string |
| |||
| trapezoidal thread | |||
| acme thread; buttress thread | |||
| трапециевидная резьба: 5 phrases in 3 subjects |
| Oil and gas | 3 |
| Oil and gas technology | 1 |
| Oilfields | 1 |