 |
| |||
| ash-free matter; mineral-matter-free basis (топлива) | |||
| ash-free coal (угля); mineral-matter-free coal (угля) | |||
| беззольная масса: 34 phrases in 7 subjects |
| Energy industry | 18 |
| Gas processing plants | 3 |
| Geology | 2 |
| Mining | 3 |
| Natural resourses and wildlife conservation | 2 |
| Technology | 5 |
| Thermal engineering | 1 |