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transformer substation : 71 phrases in 24 subjects |
| Architecture | 2 |
| Automated equipment | 1 |
| Caspian | 1 |
| Communications | 1 |
| Construction | 9 |
| Electric machinery | 1 |
| Electrical engineering | 3 |
| Electricity | 3 |
| Energy industry | 4 |
| Energy system | 8 |
| General | 6 |
| Gold mining | 1 |
| GOST | 1 |
| Karachaganak | 2 |
| Mining | 1 |
| Oil / petroleum | 2 |
| Oil and gas | 2 |
| Oilfields | 1 |
| Production | 7 |
| Sakhalin | 1 |
| Soviet | 2 |
| Technology | 5 |
| Tengiz | 3 |
| Weapons of mass destruction | 4 |