- backfilled retreating longwall method
- выемка длинными забоями обратным ходом при управлении кровлей закладкой
English-Russian mining dictionary. В.П. Манышев.
backfilled retreating longwall method
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coal mining — Coal was very important in the economic development of Britain. It was used as fuel in the factories built during the Industrial Revolution and continued to be important until the 1980s. The main coalfields are in north east England, the north… … Universalium
