- Denver Mineral jig
- Горное дело: двухкамерная диафрагмовая отсадочная машина
Универсальный англо-русский словарь. Академик.ру. 2011.
Denver Mineral jig
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Coal breaker — A coal breaking plant, depicted on a postcard in 1907. A coal breaker was a coal processing plant which broke coal into various useful sizes. Coal breakers also removed impurities from the coal (typically slate) and deposited them into a culm… … Wikipedia
