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| постепенное расширение; прогрессивное расширение | |||
| ступенчатое расширение | |||
| stage expansion: 20 phrases in 12 subjects |
| Finances | 1 |
| Makarov | 1 |
| Mechanic engineering | 4 |
| Mining | 1 |
| Oil / petroleum | 1 |
| Oil and gas | 1 |
| Oil and gas technology | 1 |
| Oilfields | 2 |
| Rail transport | 3 |
| Refrigeration | 3 |
| Technology | 1 |
| Thermal engineering | 1 |