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fuel system : 43 phrases in 14 subjects |
| Aviation | 1 |
| Chemistry | 1 |
| Construction | 1 |
| Ecology | 1 |
| Energy industry | 3 |
| Forestry | 1 |
| Industry | 1 |
| Mechanic engineering | 2 |
| Metallurgy | 1 |
| Mineral products | 1 |
| Natural resourses and wildlife conservation | 1 |
| Nuclear physics | 2 |
| Technology | 1 |
| Transport | 26 |