- room-and-pillar without extraction of pillars
- камерная система разработки
English-Russian mining dictionary. 2015.
room-and-pillar without extraction of pillars
Смотреть что такое "room-and-pillar without extraction of pillars" в других словарях:
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
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