bn:00815584n
Noun Concept
Categories: Underground mining, Civil engineering stubs, Coal mining
EN
bell pit  bell pits  Bell pitting
EN
A bell pit is a primitive method of mining coal, iron ore, or other minerals lying near the surface. Wikipedia
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EN
A bell pit is a primitive method of mining coal, iron ore, or other minerals lying near the surface. Wikipedia
Early form of simple mine shaft, widened at the bottom and in cross-section shaled like a bell Wikidata
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