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| coal hydrogenation; coal liquefaction | |||
| hydrating coal gasification | |||
| coal technology (The processing of coal to make gaseous and liquid fuels; Переработка угля в целях производства газообразных и жидких видов топлива) | |||
| гидрогенизация угля: 5 phrases in 2 subjects |
| Energy industry | 3 |
| Technology | 2 |