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rectifier transformer : 30 phrases in 15 subjects |
| Aluminium industry | 1 |
| Astronautics | 1 |
| Aviation | 2 |
| Electrical engineering | 2 |
| Energy industry | 1 |
| General | 2 |
| Metallurgy | 2 |
| Military | 2 |
| Nautical | 1 |
| Rail transport | 1 |
| Sakhalin | 2 |
| Space | 3 |
| Technology | 6 |
| Tengiz | 2 |
| Welding | 2 |