 |
| левая резьба: 45 phrases in 16 subjects |
| Automobiles | 6 |
| Aviation | 1 |
| Construction | 2 |
| Drilling | 2 |
| General | 3 |
| Makarov | 1 |
| Mechanic engineering | 6 |
| Mechanics | 1 |
| Oil / petroleum | 5 |
| Oil and gas technology | 4 |
| Oilfields | 2 |
| Plastics | 1 |
| Polymers | 1 |
| Sakhalin | 1 |
| Technology | 8 |
| Welding | 1 |